The present invention provides a planting bed temperature control system and method, which employs the direct irrigation with temperature controlled water and/or an indirect heat exchange method to adjust the temperature of the planting bed, and comprises at least one planting bed a water tank for storing and supplying reserve water for temperature adjustment and/or irrigation a temperature detection unit for detecting the temperature of the planting bed and reserve water a heating unit for heating the reserve water a cooling unit for cooling the reserve water a control unit for obtaining the current temperature of the planting bed and reserve water via the temperature detection unit and controlling the heating unit and the cooling unit to adjust the temperature of the reserve water based on a preset target temperature and, a water supply unit for supplying the reserve water after temperature adjustment to the planting bed for heat exchange to control the planting bed being maintained at the preset temperature.一種植床溫度控制系統與方法,係透過控制溫度的水直接灌溉及/或間接的熱交換方式調整植床的溫度;包括:至少一植床;一水箱用以儲存並供應調溫及/或灌溉用的儲備水;一溫度偵測單元用以偵測植床和儲備水的溫度;一加溫單元用以對儲備水加溫;一降溫單元用以對儲備水降溫;一控制單元,透過溫度偵測單元取得植床及儲備水的當前溫度,並依據一設定之標的溫度,控制加溫單元和降溫單元調整儲備水的溫度;以及一送水單元,用以將調整溫度後的儲備水輸送至植床進行熱交換,以控制植床維持在設定的溫度。10‧‧‧栽培皿11‧‧‧調溫管20‧‧‧水箱30‧‧‧溫度偵測單元40‧‧‧加溫單元50‧‧‧降溫單元60‧‧‧控制單元70‧‧‧送水單元B‧‧‧植床M‧‧‧植床材料W‧‧‧儲備水