The invention relates to a parameter detection auxiliary system for electric power circuit based on Internet of Things, which belongs to the field of electrical parameter detection of a high power system. The invention aims to provide a brand new parameter detection auxiliary device for circuit to solve a problem that worker need to climb a tower to connect wires, so that personal safety can be guaranteed to the greatest extent. The adopted scheme comprises two parts, a software system and a hardware system. The software system is a mobile phone application (APP) which is used to remote control the hardware system. The hardware system comprises: a testing end control device, a matching end control device and a parameter tester. According to the parameter detection auxiliary system for electric power circuit based on Internet of Things, single-end remote control is realized by adopting GPRS Internet of Things communication mode, automatic conversion of connection mode of testing wires in two ends of the circuit is achieved, detection work of the electric power circuit parameters can be completed more quickly, reliably and safely. The invention is suitable for parameter detection ofelectric power circuit.