diff --git a/myems-api/excelexporters/storeenergycategory.py b/myems-api/excelexporters/storeenergycategory.py
new file mode 100644
index 00000000..2c7ab12a
--- /dev/null
+++ b/myems-api/excelexporters/storeenergycategory.py
@@ -0,0 +1,559 @@
+import base64
+import uuid
+import os
+from openpyxl.chart import (
+    PieChart,
+    LineChart,
+    BarChart,
+    Reference,
+)
+from openpyxl.styles import PatternFill, Border, Side, Alignment, Font
+from openpyxl.drawing.image import Image
+from openpyxl import Workbook
+from openpyxl.chart.label import DataLabelList
+
+
+####################################################################################################################
+# PROCEDURES
+# Step 1: Validate the report data
+# Step 2: Generate excel file
+# Step 3: Encode the excel file bytes to Base64
+####################################################################################################################
+
+
+def export(report,
+           name,
+           reporting_start_datetime_local,
+           reporting_end_datetime_local,
+           period_type):
+    ####################################################################################################################
+    # Step 1: Validate the report data
+    ####################################################################################################################
+    if report is None:
+        return None
+    print(report)
+
+    ####################################################################################################################
+    # Step 2: Generate excel file from the report data
+    ####################################################################################################################
+    filename = generate_excel(report,
+                              name,
+                              reporting_start_datetime_local,
+                              reporting_end_datetime_local,
+                              period_type)
+    ####################################################################################################################
+    # Step 3: Encode the excel file to Base64
+    ####################################################################################################################
+    try:
+        with open(filename, 'rb') as binary_file:
+            binary_file_data = binary_file.read()
+    except IOError as ex:
+        pass
+
+    # Base64 encode the bytes
+    base64_encoded_data = base64.b64encode(binary_file_data)
+    # get the Base64 encoded data using human-readable characters.
+    base64_message = base64_encoded_data.decode('utf-8')
+    # delete the file from server
+    try:
+        os.remove(filename)
+    except NotImplementedError as ex:
+        pass
+    return base64_message
+
+
+def generate_excel(report,
+                   name,
+                   reporting_start_datetime_local,
+                   reporting_end_datetime_local,
+                   period_type):
+    wb = Workbook()
+    ws = wb.active
+
+    # Row height
+    ws.row_dimensions[1].height = 102
+
+    for i in range(2, 2000 + 1):
+        ws.row_dimensions[i].height = 42
+    #
+    # for i in range(2, 37 + 1):
+    #     ws.row_dimensions[i].height = 30
+    #
+    # for i in range(38, 90 + 1):
+    #     ws.row_dimensions[i].height = 30
+
+    # Col width
+    ws.column_dimensions['A'].width = 1.5
+
+    ws.column_dimensions['B'].width = 25.0
+
+    for i in range(ord('C'), ord('L')):
+        ws.column_dimensions[chr(i)].width = 15.0
+
+    # Font
+    name_font = Font(name='Constantia', size=15, bold=True)
+    title_font = Font(name='宋体', size=15, bold=True)
+    data_font = Font(name='Franklin Gothic Book', size=11)
+
+    table_fill = PatternFill(fill_type='solid', fgColor='1F497D')
+    f_border = Border(left=Side(border_style='medium', color='00000000'),
+                      right=Side(border_style='medium', color='00000000'),
+                      bottom=Side(border_style='medium', color='00000000'),
+                      top=Side(border_style='medium', color='00000000')
+                      )
+    b_border = Border(
+        bottom=Side(border_style='medium', color='00000000'),
+    )
+
+    b_c_alignment = Alignment(vertical='bottom',
+                              horizontal='center',
+                              text_rotation=0,
+                              wrap_text=True,
+                              shrink_to_fit=False,
+                              indent=0)
+    c_c_alignment = Alignment(vertical='center',
+                              horizontal='center',
+                              text_rotation=0,
+                              wrap_text=True,
+                              shrink_to_fit=False,
+                              indent=0)
+    b_r_alignment = Alignment(vertical='bottom',
+                              horizontal='right',
+                              text_rotation=0,
+                              wrap_text=True,
+                              shrink_to_fit=False,
+                              indent=0)
+    c_r_alignment = Alignment(vertical='bottom',
+                              horizontal='center',
+                              text_rotation=0,
+                              wrap_text=True,
+                              shrink_to_fit=False,
+                              indent=0)
+
+    # Img
+    img = Image("excelexporters/myems.png")
+    img.width = img.width * 1.1
+    img.height = img.height * 1.1
+    # img = Image("myems.png")
+    ws.add_image(img, 'B1')
+
+    # Title
+    ws.row_dimensions[3].height = 60
+
+    ws['B3'].font = name_font
+    ws['B3'].alignment = b_r_alignment
+    ws['B3'] = 'Name:'
+    ws['C3'].border = b_border
+    ws['C3'].alignment = b_c_alignment
+    ws['C3'].font = name_font
+    ws['C3'] = name
+
+    ws['D3'].font = name_font
+    ws['D3'].alignment = b_r_alignment
+    ws['D3'] = 'Period:'
+    ws['E3'].border = b_border
+    ws['E3'].alignment = b_c_alignment
+    ws['E3'].font = name_font
+    ws['E3'] = period_type
+
+    ws['F3'].font = name_font
+    ws['F3'].alignment = b_r_alignment
+    ws['F3'] = 'Date:'
+    ws['G3'].border = b_border
+    ws['G3'].alignment = b_c_alignment
+    ws['G3'].font = name_font
+    # print(type(reporting_start_datetime_local))
+    ws['G3'] = reporting_start_datetime_local[:10] + "__" + reporting_end_datetime_local[:10]
+    ws.merge_cells("G3:H3")
+
+    if "reporting_period" not in report.keys() or \
+            "names" not in report['reporting_period'].keys() or len(report['reporting_period']['names']) == 0:
+        filename = str(uuid.uuid4()) + '.xlsx'
+        wb.save(filename)
+
+        return filename
+    #################################################
+    # First: 能耗分析
+    # 6: title
+    # 7: table title
+    # 8~10 table_data
+    # Total: 5 rows
+    # if has not energy data: set low height for rows
+    #################################################
+    reporting_period_data = report['reporting_period']
+
+    has_energy_data_flag = True
+    if "names" not in reporting_period_data.keys() or \
+            reporting_period_data['names'] is None or \
+            len(reporting_period_data['names']) == 0:
+        has_energy_data_flag = False
+
+    if has_energy_data_flag:
+        ws['B6'].font = title_font
+        ws['B6'] = name + ' 能耗分析'
+
+        category = reporting_period_data['names']
+        ca_len = len(category)
+
+        ws.row_dimensions[7].height = 60
+        ws['B7'].fill = table_fill
+        ws['B7'].border = f_border
+
+        ws['B8'].font = title_font
+        ws['B8'].alignment = c_c_alignment
+        ws['B8'] = '能耗'
+        ws['B8'].border = f_border
+
+        ws['B9'].font = title_font
+        ws['B9'].alignment = c_c_alignment
+        ws['B9'] = '单位面积能耗'
+        ws['B9'].border = f_border
+
+        ws['B10'].font = title_font
+        ws['B10'].alignment = c_c_alignment
+        ws['B10'] = '环比'
+        ws['B10'].border = f_border
+
+        col = ''
+
+        for i in range(0, ca_len):
+            col = chr(ord('C') + i)
+            row = '7'
+            cell = col + row
+            ws[col + '7'].fill = table_fill
+            ws[col + '7'].font = name_font
+            ws[col + '7'].alignment = c_c_alignment
+            ws[col + '7'] = reporting_period_data['names'][i] + " (" + reporting_period_data['units'][i] + ")"
+            ws[col + '7'].border = f_border
+
+            ws[col + '8'].font = name_font
+            ws[col + '8'].alignment = c_c_alignment
+            ws[col + '8'] = round(reporting_period_data['subtotals'][i], 2)
+            ws[col + '8'].border = f_border
+
+            ws[col + '9'].font = name_font
+            ws[col + '9'].alignment = c_c_alignment
+            ws[col + '9'] = round(reporting_period_data['subtotals_per_unit_area'][i], 2)
+            ws[col + '9'].border = f_border
+
+            ws[col + '10'].font = name_font
+            ws[col + '10'].alignment = c_c_alignment
+            ws[col + '10'] = str(round(reporting_period_data['increment_rates'][i] * 100, 2)) + "%" \
+                if reporting_period_data['increment_rates'][i] is not None else "-"
+            ws[col + '10'].border = f_border
+
+        # TCE TCO2E
+        end_col = col
+        # TCE
+        tce_col = chr(ord(end_col) + 1)
+        ws[tce_col + '7'].fill = table_fill
+        ws[tce_col + '7'].font = name_font
+        ws[tce_col + '7'].alignment = c_c_alignment
+        ws[tce_col + '7'] = "吨标准煤 (TCE)"
+        ws[tce_col + '7'].border = f_border
+
+        ws[tce_col + '8'].font = name_font
+        ws[tce_col + '8'].alignment = c_c_alignment
+        ws[tce_col + '8'] = round(reporting_period_data['total_in_kgce'] / 1000, 2)
+        ws[tce_col + '8'].border = f_border
+
+        ws[tce_col + '9'].font = name_font
+        ws[tce_col + '9'].alignment = c_c_alignment
+        ws[tce_col + '9'] = round(reporting_period_data['total_in_kgce_per_unit_area'] / 1000, 2)
+        ws[tce_col + '9'].border = f_border
+
+        ws[tce_col + '10'].font = name_font
+        ws[tce_col + '10'].alignment = c_c_alignment
+        ws[tce_col + '10'] = str(round(reporting_period_data['increment_rate_in_kgce'] * 100, 2)) + "%" \
+            if reporting_period_data['increment_rate_in_kgce'] is not None else "-"
+        ws[tce_col + '10'].border = f_border
+
+        # TCO2E
+        tco2e_col = chr(ord(end_col) + 2)
+        ws[tco2e_col + '7'].fill = table_fill
+        ws[tco2e_col + '7'].font = name_font
+        ws[tco2e_col + '7'].alignment = c_c_alignment
+        ws[tco2e_col + '7'] = "吨二氧化碳排放 (TCO2E)"
+        ws[tco2e_col + '7'].border = f_border
+
+        ws[tco2e_col + '8'].font = name_font
+        ws[tco2e_col + '8'].alignment = c_c_alignment
+        ws[tco2e_col + '8'] = round(reporting_period_data['total_in_kgco2e'] / 1000, 2)
+        ws[tco2e_col + '8'].border = f_border
+
+        ws[tco2e_col + '9'].font = name_font
+        ws[tco2e_col + '9'].alignment = c_c_alignment
+        ws[tco2e_col + '9'] = round(reporting_period_data['total_in_kgco2e_per_unit_area'] / 1000, 2)
+        ws[tco2e_col + '9'].border = f_border
+
+        ws[tco2e_col + '10'].font = name_font
+        ws[tco2e_col + '10'].alignment = c_c_alignment
+        ws[tco2e_col + '10'] = str(round(reporting_period_data['increment_rate_in_kgco2e'] * 100, 2)) + "%" \
+            if reporting_period_data['increment_rate_in_kgco2e'] is not None else "-"
+        ws[tco2e_col + '10'].border = f_border
+    else:
+        for i in range(6, 10 + 1):
+            ws.row_dimensions[i].height = 0.1
+    #################################################
+    # Second: 分时电耗
+    # 12: title
+    # 13: table title
+    # 14~17 table_data
+    # Total: 6 rows
+    ################################################
+    has_ele_peak_flag = True
+    if "toppeaks" not in reporting_period_data.keys() or \
+            reporting_period_data['toppeaks'] is None or \
+            len(reporting_period_data['toppeaks']) == 0:
+        has_ele_peak_flag = False
+
+    if has_ele_peak_flag:
+        ws['B12'].font = title_font
+        ws['B12'] = name + ' 分时电耗'
+
+        ws.row_dimensions[13].height = 60
+        ws['B13'].fill = table_fill
+        ws['B13'].font = name_font
+        ws['B13'].alignment = c_c_alignment
+        ws['B13'].border = f_border
+
+        ws['C13'].fill = table_fill
+        ws['C13'].font = name_font
+        ws['C13'].alignment = c_c_alignment
+        ws['C13'].border = f_border
+        ws['C13'] = '分时电耗'
+
+        ws['B14'].font = title_font
+        ws['B14'].alignment = c_c_alignment
+        ws['B14'] = '尖'
+        ws['B14'].border = f_border
+
+        ws['C14'].font = title_font
+        ws['C14'].alignment = c_c_alignment
+        ws['C14'].border = f_border
+        ws['C14'] = round(reporting_period_data['toppeaks'][0], 2)
+
+        ws['B15'].font = title_font
+        ws['B15'].alignment = c_c_alignment
+        ws['B15'] = '峰'
+        ws['B15'].border = f_border
+
+        ws['C15'].font = title_font
+        ws['C15'].alignment = c_c_alignment
+        ws['C15'].border = f_border
+        ws['C15'] = round(reporting_period_data['onpeaks'][0], 2)
+
+        ws['B16'].font = title_font
+        ws['B16'].alignment = c_c_alignment
+        ws['B16'] = '平'
+        ws['B16'].border = f_border
+
+        ws['C16'].font = title_font
+        ws['C16'].alignment = c_c_alignment
+        ws['C16'].border = f_border
+        ws['C16'] = round(reporting_period_data['midpeaks'][0], 2)
+
+        ws['B17'].font = title_font
+        ws['B17'].alignment = c_c_alignment
+        ws['B17'] = '谷'
+        ws['B17'].border = f_border
+
+        ws['C17'].font = title_font
+        ws['C17'].alignment = c_c_alignment
+        ws['C17'].border = f_border
+        ws['C17'] = round(reporting_period_data['offpeaks'][0], 2)
+
+        pie = PieChart()
+        pie.title = name + ' 分时电耗'
+        labels = Reference(ws, min_col=2, min_row=14, max_row=17)
+        pie_data = Reference(ws, min_col=3, min_row=13, max_row=17)
+        pie.add_data(pie_data, titles_from_data=True)
+        pie.set_categories(labels)
+        pie.height = 7.25  # cm 1.05*5 1.05cm = 30 pt
+        pie.width = 9
+        # pie.title = "Pies sold by category"
+        s1 = pie.series[0]
+        s1.dLbls = DataLabelList()
+        s1.dLbls.showCatName = False  # 标签显示
+        s1.dLbls.showVal = True  # 数量显示
+        s1.dLbls.showPercent = True  # 百分比显示
+        # s1 = CharacterProperties(sz=1800)     # 图表中字体大小 *100
+
+        ws.add_chart(pie, "D13")
+
+    else:
+        for i in range(12, 18 + 1):
+            ws.row_dimensions[i].height = 0.1
+        # end_row 10
+        # start_row 12
+    ################################################
+    # Third: 子空间能耗
+    # 19: title
+    # 20: table title
+    # 21~24 table_data
+    # Total: 6 rows
+    ################################################
+    has_child_flag = True
+    # Judge if the space has child space, if not, delete it.
+    if "child_space" not in report.keys() or "energy_category_names" not in report['child_space'].keys() or \
+            len(report['child_space']["energy_category_names"]) == 0:
+        has_child_flag = False
+
+    if has_child_flag:
+        child = report['child_space']
+        child_spaces = child['child_space_names_array'][0]
+        child_subtotals = child['subtotals_array'][0]
+
+        ws['B19'].font = title_font
+        ws['B19'] = name + ' 子空间能耗'
+
+        ws.row_dimensions[20].height = 60
+        ws['B20'].fill = table_fill
+        ws['B20'].border = f_border
+        ca_len = len(child['energy_category_names'])
+
+        for i in range(0, ca_len):
+            row = chr(ord('C') + i)
+            ws[row + '20'].fill = table_fill
+            ws[row + '20'].font = title_font
+            ws[row + '20'].alignment = c_c_alignment
+            ws[row + '20'].border = f_border
+            ws[row + '20'] = child['energy_category_names'][i] + ' (' + child['units'][i] + ')'
+
+        space_len = len(child['child_space_names_array'][0])
+        for i in range(0, space_len):
+            row = str(i + 21)
+
+            ws['B' + row].font = name_font
+            ws['B' + row].alignment = c_c_alignment
+            ws['B' + row] = child['child_space_names_array'][0][i]
+            ws['B' + row].border = f_border
+
+            for j in range(0, ca_len):
+                col = chr(ord('C') + j)
+                ws[col + row].font = name_font
+                ws[col + row].alignment = c_c_alignment
+                ws[col + row] = round(child['subtotals_array'][j][i], 2)
+                ws[col + row].border = f_border
+                # pie
+                # 25~30: pie
+                pie = PieChart()
+                pie.title = ws.cell(column=3 + j, row=20).value
+                labels = Reference(ws, min_col=2, min_row=21, max_row=24)
+                pie_data = Reference(ws, min_col=3 + j, min_row=20, max_row=24)
+                pie.add_data(pie_data, titles_from_data=True)
+                pie.set_categories(labels)
+                pie.height = 6.6  # cm 1.05*5 1.05cm = 30 pt
+                pie.width = 8
+                # pie.title = "Pies sold by category"
+                s1 = pie.series[0]
+                s1.dLbls = DataLabelList()
+                s1.dLbls.showCatName = True  # 标签显示
+                s1.dLbls.showVal = True  # 数量显示
+                s1.dLbls.showPercent = True  # 百分比显示
+                # s1 = CharacterProperties(sz=1800)     # 图表中字体大小 *100
+                chart_col = chr(ord('B') + 2 * j)
+                chart_cell = chart_col + '25'
+                ws.add_chart(pie, chart_cell)
+    else:
+        for i in range(19, 36 + 1):
+            ws.row_dimensions[i].height = 0.1
+    for i in range(30, 35 + 1):
+        ws.row_dimensions[i].height = 0.1
+    ################################################
+    # Fourth: 能耗详情
+    # 37: title
+    # 38~ 38+ca_len*6-1: line
+    # 38+ca_len*6: table title
+    # 38+ca_len*6~: table_data
+    ################################################
+    reporting_period_data = report['reporting_period']
+    times = reporting_period_data['timestamps']
+    has_detail_data_flag = True
+    ca_len = len(report['reporting_period']['names'])
+    table_row = 38 + ca_len * 6
+    if "timestamps" not in reporting_period_data.keys() or \
+            reporting_period_data['timestamps'] is None or \
+            len(reporting_period_data['timestamps']) == 0:
+        has_detail_data_flag = False
+
+    if has_detail_data_flag:
+        ws['B37'].font = title_font
+        ws['B37'] = name + ' 能耗详情'
+
+        ws.row_dimensions[table_row].height = 60
+        ws['B' + str(table_row)].fill = table_fill
+        ws['B' + str(table_row)].font = title_font
+        ws['B' + str(table_row)].border = f_border
+        ws['B' + str(table_row)].alignment = c_c_alignment
+        ws['B' + str(table_row)] = '时间'
+        time = times[0]
+        has_data = False
+        max_row = 0
+        if len(time) > 0:
+            has_data = True
+            max_row = table_row + len(time)
+            print("max_row", max_row)
+
+        if has_data:
+            for i in range(0, len(time)):
+                col = 'B'
+                row = str(table_row + 1 + i)
+                # col = chr(ord('B') + i)
+                ws[col + row].font = title_font
+                ws[col + row].alignment = c_c_alignment
+                ws[col + row] = time[i]
+                ws[col + row].border = f_border
+
+            for i in range(0, ca_len):
+                # 38 title
+                col = chr(ord('C') + i)
+
+                ws[col + str(table_row)].fill = table_fill
+                ws[col + str(table_row)].font = title_font
+                ws[col + str(table_row)].alignment = c_c_alignment
+                ws[col + str(table_row)] = reporting_period_data['names'][i] + \
+                                           " (" + reporting_period_data['units'][i] + ")"
+                ws[col + str(table_row)].border = f_border
+
+                # 39 data
+                time = times[i]
+                time_len = len(time)
+
+                for j in range(0, time_len):
+                    row = str(table_row + 1 + j)
+                    # col = chr(ord('B') + i)
+                    ws[col + row].font = title_font
+                    ws[col + row].alignment = c_c_alignment
+                    ws[col + row] = round(reporting_period_data['values'][i][j], 2)
+                    ws[col + row].border = f_border
+                # line
+                # 39~: line
+                line = LineChart()
+                line.title = '报告期消耗 - '
+                labels = Reference(ws, min_col=2, min_row=table_row + 1, max_row=max_row + 1)
+                line_data = Reference(ws, min_col=3 + i, min_row=table_row, max_row=max_row + 1)  # openpyxl bug
+                line.add_data(line_data, titles_from_data=True)
+                line.set_categories(labels)
+                line_data = line.series[0]
+                line_data.marker.symbol = "circle"
+                line_data.smooth = False
+                line.height = 8.25  # cm 1.05*5 1.05cm = 30 pt
+                line.width = 24
+                # pie.title = "Pies sold by category"
+                line.dLbls = DataLabelList()
+                # line.dLbls.showCatName = True  # label show
+                line.dLbls.showVal = True  # val show
+                line.dLbls.showPercent = True  # percent show
+                # s1 = CharacterProperties(sz=1800)     # font size *100
+                chart_col = 'B'
+                chart_cell = chart_col + str(38 + 6 * i)
+                ws.add_chart(line, chart_cell)
+    else:
+        for i in range(37, 69 + 1):
+            ws.row_dimensions[i].height = 0.1
+
+    filename = str(uuid.uuid4()) + '.xlsx'
+    wb.save(filename)
+
+    return filename