Disclosed are a cultivation device for automatically watering plants and a cultivation device for automatically adding water. The cultivation device for automatically watering plants comprises a water container (1001, 1020, 9030), a water bottle socket interface device (1002, 1050, 9020), and one or two or more plant cultivation containers (1003, 2023, 2024, 1010, 2050, 7020, 9010), wherein the water container (1001, 1020, 9030) comprises a plant cultivation container placing space and a water bottle socket interface device placing space； the bottom or bottom extended leg of the plant cultivation container (1003, 2023, 2024, 1010, 2050, 7020, 9010) is arranged in the plant cultivation container placing space； the bottom or bottom extended leg of the plant cultivation container (1003, 2023, 2024, 1010, 2050, 7020, 9010) is provided with a hole or a slot for water to enter or leave； the water in the water container (1001, 1020, 9030) can enter into the plant cultivation container (1003, 2023, 2024, 1010, 2050, 7020, 9010). In the cultivation device for automatically adding water, the bottom of the plant cultivation container (1003, 2023, 2024, 1010, 2050, 7020, 9010) comprises a cultivation container bottom opening (1060, 2020, 6091) for ventilation and drainage； the water bottle socket interface device (1002, 1050, 9020) is fixedly or detachably placed on a water container cover (1051, 2014, 1030, 6030), the water bottle socket interface device (1002, 1050, 9020) comprises a water bottle connection port (11051) opened upwards and connected by an external connected water bottle (1005), the interior of the external connected water bottle (1005) is in communication with the interior of the water container (1001, 1020, 9030) by means of the water bottle connection port (11051)； a cultivation container placing opening (1080, 6092) is arranged on the water container cover (1051, 2014, 1030, 6030), some or all of the bottom of the plant cultivation container (1003, 2023, 20
