Railway and highway traffic projects inevitably require a large number of tunnels to pass through hills or mountains due to the complex topographic conditions. Accordingly, tunnel construction increases in proportion, scale, and number and becomes increasingly important. In this study, we reviewed the key factors of the monitoring system for the working environment in tunnel construction. The evaluation criteria for the procurement of environment monitoring equipment for tunnel construction were established and summarized on the basis of engineering cases and a literature review. Then, an evaluation scale to assess the weights of key factors was established through the Analytic Hierarchy Process (AHP), which includes four evaluation dimensions, 13 sub-level evaluation criteria, and their weights. Finally, three suppliers of construction environment monitoring equipment were selected for empirical analysis. The research results verified the effectiveness of the evaluation scale, which can provide a systematic evaluation mode for government engineering units to select the environment monitoring equipment for future construction.