The invention discloses a system and a method for remotely detecting and diagnosing safety performance of electric car charging equipment on a demand side. According to the system and the method, safety performance detection data of the electric car charging equipment are acquired by each detection sensor, each safety performance detection sensor is wirelessly communicated with a station-side safety performance detection data collection communication terminal, and the collection communication terminal actively uploads the detection data to a data cloud platform through mobile communication. Adetection and diagnosis remote center analyzes the safety performance detection data of the data cloud platform, finds out the charging equipment with potential safety hazards, screens out detection items with unqualified safety performance, forms a remote detection and diagnosis report for each electric car charging equipment and continuously updates the safety state of the charging equipment. Remote detection and diagnosis of the electric car charging equipment are realized, various defects of conventional site manual detection are eliminated, and charging safety guarantee and charging experience of electric car users are improved comprehensively.