A plant cultivation device includes a case (100), a temperature control module (200), and a circulation fan (310). A cultivation room (110) is formed in the case (100). The temperature control module (200) includes a piezoelectric chip (210) and a heat exchange assembly (230). The piezoelectric chip (210) includes a first surface (211) outside the cultivation room (110) and a second surface (212) inside the cultivation room (110). The second surface (212) is opposite to the first surface (211). The heat exchange assembly (230) is attached to the second surface (212). The circulation fan (310) is attached to the heat exchange assembly (230) and includes an inlet side (311) for drawing in air and an outlet side (312) for blowing out air, and the inlet side (311) and the outlet side (312) are arranged in the cultivation room (110).
