In the area of using renewable energy, promoting the efficiency of seawater source heat pump plays an important part. Several nontraditional technologies are can be used in the new seawater source heat pump system. As for the intake system, infiltration intake technology is introduced, which can increase the supply temperature of sea water and thus raise the efficiency of the system. And as for the terminals, a new-style PVC low temperature water flowing radiant heating (LTWFRH) system is used to match the temperature characteristics of seawater source. After the optimization of the whole system, the seawater source heat pump can be more efficiency and thus saving more energy, considering the energy conservation effect of seawater source heat pump itself.