Geothermal heat pumps have been widely used in construction projects. However, the efficiency of geothermal heat pump may be easily lowered due to the imbalance between heating and cooling loads resulting from the differences of seasons, and especially building functions. Basing on a project in LEU, this article firstly takes discussion on how the solar-geothermal water heating system complex may be applied in Chongqing. Then, the article carries out calculations and analysis to evaluate the balance of the complex system. It mainly aims at providing useful advices for the application of solar-geothermal water heating system complex in Chongqing.