An exhaust assembly for an aerostat, comprising a valve base provided with a valve port, and a valve cover that selectively covers the valve port, and further comprising: a motor driving mechanism and a transmission mechanism that are arranged on the valve base, wherein the motor driving mechanism propels the transmission mechanism to drive the valve cover to selectively cover the valve port, wherein when the valve cover is in a position where the valve port is open, the valve cover is arranged at an angle with respect to a plane at which the valve port is located, wherein when the valve cover is in a position where the valve cover covers the valve port, a plane at which the valve cover is located is parallel to the plane at which the valve port is located; and when the valve cover is in the position where the valve port is open, a plane at which the valve cover is located is vertical to the plane at which the valve port is located, wherein the motor driving mechanism comprises a motor, and the motor has an output shaft that is connected to the transmission mechanism, wherein the transmission mechanism comprises: a shifting fork that is connected to the output shaft and that rotates when driven by the output shaft; a first interlocking shaft that is slidably arranged in a guide slot of the shifting fork, wherein the first interlocking shaft is connected to the valve cover by using a connection shaft; a sliding slot that guides the first interlocking shaft to drive the valve cover to switch between the opening location and the covering location; and a second interlocking shaft that is associated with the first interlocking shaft, wherein the second interlocking shaft is arranged between the first interlocking shaft and the valve cover, wherein the connection shaft that connects the first interlocking shaft and the valve cover extends through the second interlocking shaft, wherein the second interlocking shaft is slidably disposed in the sliding slot. a motor driving mechanism and a transmission mechanism that are arranged on the valve base, wherein the motor driving mechanism propels the transmission mechanism to drive the valve cover to selectively cover the valve port, wherein when the valve cover is in a position where the valve port is open, the valve cover is arranged at an angle with respect to a plane at which the valve port is located, wherein when the valve cover is in a position where the valve cover covers the valve port, a plane at which the valve cover is located is parallel to the plane at which the valve port is located; and when the valve cover is in the position where the valve port is open, a plane at which the valve cover is located is vertical to the plane at which the valve port is located, wherein the motor driving mechanism comprises a motor, and the motor has an output shaft that is connected to the transmission mechanism, wherein the transmission mechanism comprises: a shifting fork that is connected to the output shaft and that rotates when driven by the output shaft; a first interlocking shaft that is slidably arranged in a guide slot of the shifting fork, wherein the first interlocking shaft is connected to the valve cover by using a connection shaft; a sliding slot that guides the first interlocking shaft to drive the valve cover to switch between the opening location and the covering location; and a second interlocking shaft that is associated with the first interlocking shaft, wherein the second interlocking shaft is arranged between the first interlocking shaft and the valve cover, wherein the connection shaft that connects the first interlocking shaft and the valve cover extends through the second interlocking shaft, wherein the second interlocking shaft is slidably disposed in the sliding slot.