The invention relates to the information communication field and discloses a designing method for detecting a sensor network abnormal data based on space-time correlation. The designing method for detecting sensor network abnormal data based on space-time correlation comprises spatial dimension detection and time dimension detection, and can realize abnormal data detection and classification in the wireless sensor network. Through detection and classification results, the designing method for detecting the sensor network abnormal data based on space-time correlation can respond timely on an event happens in the network, can reduce creditworthiness of malicious nodes in the network, wherein the malicious nodes can affect an observation result of a base station through transmitting malicious data and thus reduce network reliability, and enables the data to not to be forwarded from the malicious nodes. If the creditworthiness of the node is low to a certain degree, the node is on a backlist and cannot receive data, so that the malicious node can be shield and network safety can be guaranteed.