Establishment of a grid project technical innovation and maintenance typical scheme assisted project cost compilation model comprises the following steps: establishing technical innovation and maintenance project cost data standardization requirements, and formulating a unified cost data report standard; combing through historical typical technical innovation and maintenance experience project data, and generalizing a construction technology typical scheme library; and embedding an analysis algorithm into a system to realize quick matching analysis and early warning of project cost data. According to the establishment of the model, technical innovation and maintenance typical schemes are used to assist in project cost compilation. The professional requirement of project cost compilation can be reduced scientifically. The efficiency of project cost compilation can be improved efficiently. Cost audit management can be assisted in an intelligent and refined way.