1. An integrated incubator with automatic water filling and humidifying device, wherein comprises a bottom case (1), a cover (11) provided on the bottom case (1) and a top cover (12) provided on the cover (11); the top cover (12) is provided with a controller (16), a detector (17) is provided in the cover (11), a humidifier (5) for humidifying is provided on the bottom case (1), and a water-filling unit (6) for automatic water filling is provided on a side of the bottom case (1); the controller (16) is provided in connection with the detector (17) and the humidifier (5) respectively; the water filling unit (6) comprises a bottom case cover (61), a casing (62) provided on the bottom case cover (61) for installing a water storage bottle (9), a plug (63) provided in the casing (62) to move up and down and a limit post (181) correspondingly provided below the plug (63); the top of the plug (63) passes through the upper part of the casing (62) and is connected with a sealing ring (64); the plug (63) is provided with springs (65) positioned in the lower part of the casing (62); the upper part of the casing (62) corresponds to the sealing ring (64) to form a sealing structure, and the bottom of the casing (62) is provided with a water level opening (621) for water discharge.