This paper introduces a WSNs architecture design applied in remote monitoring of power towers. First, the system general design is presented. Second, design of nodes is given in detail including cluster-head, normal node and sink. Third, a fast change detection algorithm based on DC statistic is described, which can reduce the number of repeated image. Last, a clustering routing protocol C-LEACH with its application in power towers monitoring is discussed. The techniques described in this paper can provide scientific basis for state maintenance of power system equipment.