A plant cultivation device including a case,a temperature control module,and a circulation fan is provided in the present disclosure.A cultivation room is formed in the case.The temperature control module is inclusive of a piezoelectricity chip and a heat exchange assembly.The heat exchange assembly is inclusive of a heat conductive plate and multiple fins arranged in parallel are formed on a surface of the heat conductive plate.A surface of the piezoelectricity chip is in the cultivation room and attached on the other surface of the heat conductive plate.The other surface of the piezoelectricity chip is at outside of the cultivation room.The circulation fan is attached on the heat exchange assembly.A horizontal component of an air flow direction of the circulation fan is the same as a horizontal component of a normal direction of an overall top surface of each fin. Therefore,condensation water on the fin is driven by gravity to flow out from the fin.一種植物種植箱,包含一箱體、一溫控模組及一循環風扇。箱體內形成一栽種室。溫控模組包含一壓電晶片以及一熱交換組件,熱交換組件包含一導熱板且導熱板的一面上形成有複數並列的鰭片,各鰭片分別向相對於水平面傾斜配置,壓電晶片的一面位於栽種室內且該面貼附導熱板的另一面,壓電晶片的另一面位於栽種室外。循環風扇附設在熱交換組件且循環風扇之出風方向的水平分量與各鰭片上表面整體之正向的水平分量為同向。因此鰭片上的凝水能藉由重力驅動而主動排出鰭片表面。100‧‧‧箱體101‧‧‧栽種室110‧‧‧載盤200‧‧‧溫控模組210‧‧‧壓電晶片211‧‧‧冷側212‧‧‧熱側220‧‧‧熱交換組件221‧‧‧導熱板222‧‧‧鰭片230‧‧‧散熱組件231‧‧‧熱管232‧‧‧散熱風扇233‧‧‧散熱片300‧‧‧循環風扇D1‧‧‧出風方向D11‧‧‧(出風方向的)水平分量D2‧‧‧(鯺片上表面整體的)正向D21‧‧‧(正向的)水平分量
