In this paper a kind of campus energy consumption monitoring system based on wireless sensor network is introduced for the campus energy consumption monitoring system. It illustrates the system hardware and software design and proposes multi-sensor data fusion and transmission technology. The multi-point multi-data acquisition by modern embedded development technology and data fusion technology are brought on. Modular programming framework used in system improves the efficiency of system operation and makes system update more easily. According to design, environment temperature and humidity acquisition experiments are carried out by two wireless acquisition nodes, which prove that the wireless sensor network and wired network can dock normally and also shows the accuracy of the design method.