The invention provides a waste heat recycling system comprising a first generation device and a plurality of heat pumps. Each heat pump comprises a first evaporator and a first condenser. Each first evaporator comprises a low temperature liquid inlet and a high temperature liquid outlet. Each first condenser comprises a high temperature liquid inlet and a low temperature liquid outlet. The first generation device comprises a heat source inlet and a cold source outlet. The heat source inlet communicates with the corresponding cold source outlet. The heat source inlet of the first generation device communicates with the high temperature liquid outlets of the first evaporators so as to utilize heat of liquid flowing out from the high temperature liquid outlets to generate electricity. In addition, the cold source outlet communicates with the high temperature liquid inlet of each heat pump. The liquid flows into the first generation device through the heat source inlet can flow into the first condensers from the cold source outlet after the temperature of the liquid is decreased. The invention further provides a coking system. Waste heat in coking system circulating water is recycled for generation, and accordingly the energy consumption of the coking system is reduced.