It becomes a hot topic that geothermal resources are effectively utilized; there is rich geothermal resource located in the remote areas in China. Based on the situation and development trend of geothermal utilization, the ammonia water power cycle is introduced and the cycle performance criteria, such as net power output, net power energy per ton of geothermal water, heat efficiency, and heat exchanger area of per net power, are presented. In addition, a demonstration project of geothermal resource cascade utilization in south China area is discussed, the resource utilization rate is more than 70%. The results indicate that AWPC cycling performance could be changed by adjusting the mass fraction of the ammonia solution, a higher ammonia mass fraction solution is favorable for protecting the system from the negative pressure, and the higher mass fraction is, the higher pressure is. There is an optimal circulation ratio in AWPC system, the value is about four for the mid-low temperature geothermal resource and the corresponding mass fraction difference between concentrated solution and dilute solution is about 12%—13%. The mode exploits a new way for efficiently utilizing the mid-low temperature geothermal resource.