Architectural physical environment is the most important determined elements of people comfortably using architectural space. This paper firstly analyzes the physical environment's constitution for architectural space; uses analytic hierarchy process(AHP) to establish a kind of comprehensive evaluation model for physical environment of architectural space to divide them into three-level evaluation indexes; then calculated the weight value of each index for scheme layer; at the same time, selects four teaching buildings as evaluation instances and provides the value of each index for physical environment of architectural space by experts' scoring method; at last, weights and composites with the foregoing weigh to obtain the comprehensive scores of each teaching buildings and conducts the comprehensive evaluation.