The building energy management system (BEMS) is an important tool for energy metering, analyzing, and managing. It provides critical data support for the overall operation and maintenance management of building electromechanical systems, and it is also an essential tool for implementing quota management of building energy consumption and carbon emission supervision. From The tenth Five-Year Plan, the BEMS has been applied in public buildings. After nearly 20 years of development, it has gradually become one of the standard configurations models for intelligent systems, with continuous improvements in system functions, performance, and presentation methods. Based on the questionnaire results, this article analyzes the current application status of the system from its application status, system functions, and performance. Suggestions and recommendations are proposed from systems and institutions, as well as standards and technology dimensions. It is aimed to continuously improve the application level of the system, fully leverage its value in energy utilization and efficiency improvement, and contribute to the achievement of building energy efficiency and dual carbon goals