The invention discloses a projection device suitable for unmanned aerial vehicle sondes. The sondes are placed in a plurality of sonde loading mechanisms, when an unmanned aerial vehicle reaches a preset location, thrust applied to movable bases by projection hubs is removed by a pushing mechanism, the movable bases are opened under the action of own gravity and / or the gravity of the sondes, the sondes are projected into the
atmosphere under the own gravity, and
environmental data is collected by a plurality of detecting devices carried. According to the projection device suitable for the unmanned aerial vehicle sondes, numerous unnecessary structures are reduced under the action of the gravity, so that the high-efficiency projection device suitable for
mass population and with a simple structure, light weight, saved materials and low cost is achieved; since projection is performed under the action of the gravity, fluctuations of the
projection direction caused by the device or an external environment when the sondes are projected is avoided, and the accuracy of measurement is greatly improved; and thus, data received by sensors in the sondes can be obtained accurately in real time, and changes in the
atmosphere can be accurately predicted.