With the development of society and the continuous improvement of people's material and cultural life, professional audio engineering is a new industry which has gradually developed with the continuous requirements of artistic performance, entertainment and leisure forms. Usually, the so-called professional audio engineering is a system engineering including professional stage sound and lighting system, practical audio lighting and video system, commercial broadcast and conference system, etc. In terms of engineering technology, it is a comprehensive engineering technology which includes acoustics, optics, audio frequency, video and so on. It requires engineers to study carefully according to the actual needs of different users, fully integrate into the designer's design ideas, carefully design and construction; at the same time, it can be completed with the close cooperation of building decoration and power supply departments. Therefore, the significance of professional audio engineering is very important, and the importance of engineering technology is also very prominent.