In order to make analysis and evaluation of the importance of building intelligent environment sys-tem,the systematic engineering method is applied to construct the building intelligent system.This paper puts forward the system evaluation criteria of the building intelligent environment,establishes the system e-valuation index system of the building intelligent environment,and determine the weight of each index and each system through analytic hierarchy process(AHP)to determine the optimal system evaluation program of building intelligent environment.The research results can provide basis for the evaluation of building intelli-gent environment system,and provide reference for the design and management of building intelligent envi-ronment system.