The invention relates to a system with 'a model of south of the Yangtze River' applying the ground source heat pump technology, and a control method thereof. The system comprises a heat pump unit, an indoor air conditioner, a hot water tank, a ground-source-side water divider, a ground-source-side water collector and a cooling tower, and through the connection of pipelines, the heat pump unit and the indoor air conditioner form an air conditioning circulation loop, a heat recovery unit as well as the ground-source-side water divider, the cooling tower and the-ground-source-side water collector form a ground-source-side circulation loop, and the heat pump unit and the hot water tank form a hot water supply loop; and the best model and basic model are selected according to the climatope to achieve the underground heat balance. The invention has the advantages of giving full play to the comprehensive advantages of high efficiency, energy saving, environment protection and multiple functions of the ground source heat pump, and effectively solving the problem of underground heat balance, being in line with the national electricity use policy of load shifting, being new technology actively advocated and promoted in China, not only saving energy, but also saving money when in use.