In the different types of pipe network, the running performances of the variable flow pump were calculated, using pipe valve control, the number of units control and the frequency control to adjust water flow of system, and the impacts of pipeline types on energy consumption of variable flow pump were discussed. The relationships between performance of the pipe network and pump operating condition were analyzed, including the relationship between various flow control methods and pump energy consumption. The calculated results show that the pipe characteristic produces a great impact on energy consumption of variable flow pump. The adjusting flow of system by increasing pipe resistance can also reduce pump’s energy consumption, and the amount of energy reduced is greater in closed circulation pipeline than in open type pipeline. The variable frequency drive mode has big and different impacts on energy consumption between closed circulation and open type pipeline, the greater the static pressure value, the smaller the energy saving effect. The number control and the frequency control for pump are two effective methods of energy adjustment in the loop pipe networks, the change rates of power and flow do not meet the similarity law dew to the pipe network changed.