The three subjects to be tested in the major of mechanical and electrical engineering are construction management, construction laws and regulations and related knowledge, and mechanical and electrical engineering management practice. Civil engineering is organized by Beijing Personnel Testing Center, and the registration is implemented by Beijing Planning Commission. Mechanical and electrical majors with different professional scopes mainly focus on the installation and design of building equipment, while architectural majors mainly focus on construction and design. Therefore, the project leaders of the first-level construction engineer are different. Civil engineering generally works in a specialized architectural firm or engages in related teaching and research. In the increasingly complex field of building construction, architects are increasingly playing a communication role between building investors and professional designers (such as electromechanical design, structural design, etc.) and builders. The construction engineer is a registered practitioner who relies on professional technology and focuses on project management, and recently focuses on construction management. The construction engineer is a compound person who knows management, technology, economy and laws and regulations, and has a high comprehensive quality. He should not only have a theoretical level, but also have rich practical experience and strong organizational ability. After being hired, the construction engineer can serve as the project manager of the construction project in the name of the construction engineer, engage in the management of other construction activities, and engage in other businesses as stipulated by laws, administrative regulations or the construction administrative department of the State Council.