The fan of the heating tower and circulation pump for the antifreeze solution of the heating tower are the main electrical equipment in the heating tower heat pump system, besides the compressor. By controlling the working frequencies of the fan of the heating tower and circulating pump for the anti-freezing solution, the effects of operation parameters of the closed-type heating tower on its heat absorption and the performance of its heat pump system were investigated under heating conditions in winter. The results indicated that, firstly, the reduced fan?s frequency leads to the heat absorption capacity of the heating tower reduced, as well as the system?s heating capacity and the COP. However, the SEER was increased. Secondly, the reduced frequency of circulating pump results in the heat absorption capacity of the heating tower increased firstly and then decreased, and the maximum heat absorption capacity was achieved when the frequency of the circulating pump was 25 Hz. In addition, the heating capacity of the system also increased firstly and decreased later, but with the fan?s frequency increasing, the frequency of the circulating pump which was related to the maximum heating capacity was altered from 35 Hz to 25 Hz, and the increase in frequency caused the COP increased but SEER decreased. Thirdly, when the frequency of the fan and pump dropped to 15 Hz, the evaporation temperature of the heat pump decreased, and it led the compressor works under a high compression ratio, which was not favorable for the safe operation of the heat pump. Fourthly, the maximum heating capacity exceeded 14.30 kW, the maximum COP was up to 3.31, and the maximum SEER was up to 2.37.