A method and system for obtaining wire information, includes a RFID tag, a RFID reader, and a data center. The RFID tact obtains the sensing information of the wire and transmits the sensing information and identification information of the RFID tag. The RFID reader transmits high-frequency electromagnetic waves to trigger the RFID tact and transmits and receives sensing information and identification information sent by the RFID tag. The data center is communicatively connected with the RFID reader and determines the type of the received sensing information based on the received sensing information and identification information for data analysis.