A flight declaration method comprising: a declaration party determining flight declaration information, the declaration party comprising an unmanned aerial vehicle or an unmanned aerial vehicle controller and the flight declaration information comprising a first flight mission that needs to be declared; the declaration party determining first signaling for carrying the flight declaration information, adding the flight declaration information to the first signaling, and sending the first signaling to a base station; the base station obtaining the flight declaration information from the first signaling, and sending the flight declaration information to a core network device through a first interface, the first interface being an X2 interface or an NG interface; the core network device forwarding the flight declaration information to an unmanned aerial vehicle traffic management, UTM, device; the UTM device reviewing the first flight mission to obtain a review result and sending the review result to the core network device, the review result comprising review passing or review failing; the core network device sending the review result to the base station; the base station receiving the review result sent by the core network device through a second interface, determining second signaling for carrying the review result, adding the review result to the second signaling, and sending the second signaling to the declaration party, the second interface being the X2 interface or the NG interface, and the second signaling comprising at least one of second radio resource control, RRC, signaling, media access control address control element MAC CE, and physical layer signaling; the declaration party receiving the second signaling sent by the base station, obtaining the review result from the second signaling, determining whether to perform the first flight mission according to the review result; and when the declaration party does not receive the review result within a specified time duration, re-sending the flight declaration information to the base station, and abandoning declaration when a number of re-declarations exceeds a predetermined threshold, wherein the declaration party determining the first signaling for carrying the flight declaration information comprises: in response to that the declaration party is performing network attachment, determining attachment request signaling as the first signaling; and in response to that the declaration party has completed the network attachment, determining first radio resource control, RRC, signaling as the first signaling, the first RRC signaling comprising UE assistance information signaling. a declaration party determining flight declaration information, the declaration party comprising an unmanned aerial vehicle or an unmanned aerial vehicle controller and the flight declaration information comprising a first flight mission that needs to be declared; the declaration party determining first signaling for carrying the flight declaration information, adding the flight declaration information to the first signaling, and sending the first signaling to a base station; the base station obtaining the flight declaration information from the first signaling, and sending the flight declaration information to a core network device through a first interface, the first interface being an X2 interface or an NG interface; the core network device forwarding the flight declaration information to an unmanned aerial vehicle traffic management, UTM, device; the UTM device reviewing the first flight mission to obtain a review result and sending the review result to the core network device, the review result comprising review passing or review failing; the core network device sending the review result to the base station; the base station receiving the review result sent by the core network device through a second interface, determining second signaling for carrying the review result, adding the review result to the second signaling, and sending the second signaling to the declaration party, the second interface being the X2 interface or the NG interface, and the second signaling comprising at least one of second radio resource control, RRC, signaling, media access control address control element MAC CE, and physical layer signaling; the declaration party receiving the second signaling sent by the base station, obtaining the review result from the second signaling, determining whether to perform the first flight mission according to the review result; and when the declaration party does not receive the review result within a specified time duration, re-sending the flight declaration information to the base station, and abandoning declaration when a number of re-declarations exceeds a predetermined threshold, wherein the declaration party determining the first signaling for carrying the flight declaration information comprises: in response to that the declaration party is performing network attachment, determining attachment request signaling as the first signaling; and in response to that the declaration party has completed the network attachment, determining first radio resource control, RRC, signaling as the first signaling, the first RRC signaling comprising UE assistance information signaling. in response to that the declaration party is performing network attachment, determining attachment request signaling as the first signaling; and in response to that the declaration party has completed the network attachment, determining first radio resource control, RRC, signaling as the first signaling, the first RRC signaling comprising UE assistance information signaling.