Abstract: This paper provides the key role in user behavior assessment and electrical failure diagnosis by analyzing the application of smart electricity meter data in the investigation of multiple fire accidents. The results show that: the electricity consumption behavior of users can be effectively determined by electricity information at specific time points through the data freezing function; abnormalities such as abnormal supply voltage, short circuit faults, and poor contact, especially the impact on fire accidents of three-phase imbalance caused by naught wire faults in three-phase four-wire power supply systems and excessive contact resistance, can be traced by comprehensively analyzing the load record data and abnormal events. Therefore, the application of smart electricity meter data provides a new approach for the fire investigation, further improves the accuracy and efficiency of fire reason analysis.

Key words: smart electricity meter, fire investigation, electronic data, load recording