Solar heat storing-releasing system

Provided is a solar heat storing-releasing system. Solid fused salt is molten in a salt melting tank and then enters a cold fused salt storing tank through a molten salt conveying pump. Low-temperature molten salt in the cold fused salt storing tank enters a molten salt-heat conducting oil heat exchanger through a cold fused salt conveying pump, heat exchanging with high-temperature oil conducting oil is carried out, and after heat exchanging, the molten salt enters a hot molten storing tank for heat storing. On the contrary, high-temperature molten salt in the hot molten storing tank is pumped into the molten salt-heat conducting oil heat exchanger through a hot molten salt conveying pump, heat exchanging with low-temperature heat conducting oil is carried out, and after heat exchanging, the molten salt enters the cold fused salt storing tank for heat releasing. The solar heat storing-releasing system is wide in application range, influence from day-night alternating and whether is avoided, when light is sufficient, heat storing is carried out, when light is insufficient, heat releasing is carried out, high-temperature heat conducting oil can be provided continuously and efficiently, and the fact that production working with high-temperature heat conducting oil as a heat source is carried out stably and smoothly is guaranteed. The system can be used for steam power generation, domestic water heating, winter heating or industrial raw material heating and the like, and economy is high.