The invention discloses an intermittent leakage alarm system which comprises a detection device, a handheld device and a communication medium for connecting the detection device with the handheld device. The detection device comprises a power supply, an operational component, a storage component, a leakage current transformer, a leakage current metering component, a status indicator lamp and a data interface, and the handheld device comprises a power supply, an operational component, a storage component, a touch screen and a data interface. When the intermittent leakage alarm system is used, firstly, the detection is mounted at the position of a circuit to be detected, leakage current is automatically detected for a period of time, secondly, a leakage current alarm threshold at a positionis set at the handheld device, the handheld device is connected with the detection device through a communication data line, thirdly, historical data stored by the detection device are read, leakage conditions of the circuit to be detected at the position are analyzed according to the set leakage current alarm threshold and the stored historical data of the leakage current, assembly and disassembly are easily achieved, the historical data of the leakage current are automatically recorded, and leakage conditions at all positions can be flexibly analyzed.