This project is applied to building energy efficiency supervision in the field of urban energy conservation. It is a joint venture capital institution project of the Shanghai City Science and Technology Commission in 2013. The construction period is two years (2013-07 to 2015-09) and has received special funds of 600,000 yuan. In December 2015, it passed the acceptance by the expert group of the Shanghai City Science and Technology Commission. The platform is built on a distributed network. It is a PaaS cloud service platform with big data storage and processing capabilities. It can meet the 24-hour uninterrupted monitoring of the energy consumption status of various large public buildings in the city, data collection, accurate transmission and task-based settings. Achieve data optimization, effective storage, statistical analysis, display and release, and provide services to customers through clients (browser and client methods). Fully tap the value of massive data, protect contract energy management, and truly optimize and improve the effect of energy conservation and emission reduction.  There are more and more existing buildings in the central areas of our country's cities. Before the development and promotion of this platform, there are many key issues in the field of urban building energy conservation supervision that need to be solved urgently. For example, the amount of data related to energy consumption in metropolitan buildings is very large, and there are bottlenecks in storage, transmission and data patching; the informatization transformation costs and IT operation and maintenance costs of existing buildings are high, and the business expansion capabilities are weak; System suppliers in the building control field are complex and professional, but difficult to interconnect. There are no less than hundreds of communication protocols alone, and some of the core technologies of conversion devices are in the hands of foreign manufacturers. We have carried out technological innovations in response to existing problems: (1) The platform has made major breakthroughs in big data applications, with the characteristics of elastic growth and smooth evolution, reaching petabyte data storage capacity, millisecond-level fast data throughput capacity, and tens of thousands of buildings. Minute data collection capabilities and historical data retention for up to 20 years. (2) For the first time in China, PaaS cloud platform and big data architecture have been introduced into the field of energy efficiency management to achieve on-demand deployment of business expansion capabilities and processing capabilities, overcoming the high maintenance costs, weak processing capabilities, high hardware dependence, and interoperability of traditional IT systems. Weaknesses and bottlenecks such as difficult interconnection and many information islands. Use edge computing devices with independent core technologies + cloud storage/cloud computing to collect, store, repair and utilize data. (3) A major breakthrough has been made in compatibility. It is currently compatible with mainstream building control integrated systems and is platform neutral, greatly improving data aggregation and analysis capabilities. Make full use of open source software resources, fully develop independently, possess independent intellectual property rights, and get rid of lock-in and dependence on foreign core platforms. (4) Apply Web 2.0 technology for the first time in the field of urban energy conservation. Through business intelligence and data mining, display and analysis report information is diversified, the interface is friendly, and the operation is user-friendly.  Among the intellectual property rights generated during the research and development process of this project, 5 invention patents have been applied for (3 authorized), 5 utility models, and 5 software copyrights have been applied for. In the three years after the completion of the project, we have continued to carry out technological innovation in edge computing and edge cloud collaboration, big data cleaning and data patching, and industry applications. So far, we have applied for 5 new invention patents (1 has been authorized), 3 utility models, and 7 software copyrights.  In the three years since the completion of the project, this platform and its related intellectual property rights have been widely promoted and applied in urban energy-saving renovation projects and intelligent system construction projects for new buildings undertaken by our company, including Hongqiao Airport, Rail Transit, Nanzheng Building, Shanghai City Fifth/Sixth People's Hospital, SAIC Volkswagen, China Financial Center, Admiralty Plaza, Xishi Pharmaceutical and other key project customers, generating a total sales amount of 114.49 million yuan and realizing a profit of 48.928 million yuan. The tax revenue was 8.1888 million yuan.