Disclosed is an intermittent on-off type large size concrete cooling water-diversion control system, comprising a concrete temperature acquisition system, a control terminal, a wireless control switch, an electrically operated valve, and a wireless hot spot, wherein the control terminal comprises a computer equipped with control software; the control terminal automatically obtains the temperature data of the concrete temperature acquisition system via the internet and compares the obtained data with the set targeted temperature and then emits control signals; the control signals are sent to the wireless control switch via the wireless hot spot; and the wireless control switch controls the on/off of the electrically operated valve. The following function can be achieved: when the concrete temperature is higher than the set targeted temperature, the electrically operated valve is opened to carry out water cooling operation; when the concrete temperature is lower than the set targeted temperature, the electrically operated valve is closed. The intermittent on-off type large size concrete cooling water-diversion control system sets a targeted temperature and employs the actually measured concrete temperature as the grounding for water cooling control. Therefore, it is unnecessary to specially arrange a cooling water flow and temperature sensor.