Abstract: Aiming at the problem of delay and interruption of UAV information detection and transmission in harsh and complex environment, the UAV information detection and processing system based DTN arithmetic was designed and modified. The system was constituted of flight control system, ground control system, communicate system and power management module. The best path for network information transmission was confirmed by designing the sky to sky hybrid DTN network in the communication system. It contained the definition of routing decision process, and the calculation of state collection, behavior collection, state transition probability and objective probability. To verify the property of the system was tested. The test results show that the system could complete the information detection and transmission in low error rate.