Soilless culture device and use method

The invention provides a soilless culture device and a using method, and relates to the technical field of soilless culture, the soilless culture device comprises a device box, the top end of the device box is fixedly connected with two supporting frames, the supporting frames are in bilateral symmetry, the bottom end of the interior of the device box is fixedly connected with a liquid storage box, and the interior of the liquid storage box is fixedly connected with a temperature sensor. Through the arranged translation mechanism, a first servo motor is started, the first servo motor drives a first gear to rotate, the first gear is meshed with a third gear, the third gear drives a belt through a conveying wheel, the belt drives a second gear to rotate, and the second gear and the third gear can rotate in the same direction at the same time; therefore, the racks drive the two closed frames to get away from or get close to each other, the closed frames are automatically opened and closed, the closed frames are