The invention provides a method and system for reading terminal ammeter data, and relates to the technical field of communication. The method for reading the data of the terminal ammeter comprises the following steps of: controlling the terminal ammeter to acquire a current signal; converting the current signal into predetermined system data information as current data; establishing a wireless communication line of the terminal ammeter, and sending the current data to a user side through the wireless communication line; and by the user side, using APP to receive the current data. According to the method and the system for reading the terminal ammeter data, signals can be timely and stably received, test data can be visually and clearly watched, the test data can be changed, deleted and stored in real time, a one-key calibration function is realized, potential danger of high voltage to users is eliminated, transmission and management of current data are facilitated, and the method is higher in precision, more stable, lower in cost, safe and reliable.