To provide a photovoltaic power generation heat collecting system improving the utilization efficiency of solar energy by generating power and collecting heat at a low cost without increasing an installation area.

A plurality of photovoltaic power generation modules 6 are disposed on a roof surface 42, and a light transmitting member 8 is provided above the photovoltaic power generation modules 6 to cover at least the upper parts of the photovoltaic power generation modules 6. An air flow layer S3 is formed between the light transmitting member 8 and the roof surface 42. A heat transfer means 13 connected to a heat storage means 12 disposed under the floor 11 to store heat, is connected to the air flow layer S3.

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