The alarm information generated by security equipment in intelligent measuring system is characterized by isolation, fragmentation and redundancy, which makes it difficult for security personnel to carry out security analysis and corresponding defense work. Therefore, a multi-source heterogeneous alarm fusion method for intelligent measuring system is proposed in this paper, which aims to associate and simplify the complicated and redundant alarm information of intelligent measuring system and reduce the difficulty of alarm information processing. In this paper, a multi-source heterogeneous alarm fusion framework is designed to fuse alarm information generated by different security equipment in intelligent measuring system based on the exponential weighted D-S evidence theory synthesis rules. The proposed method can reduce the total number of alarms in intelligent measuring system, reduce the complexity of alarm information, and effectively solve the problem of false alarm and missing alarm.