A data processing method based on cloud storage, comprising: a cloud management device receiving a data query request sent by a client via a cloud work device, wherein the data query request is used to request for querying media data that has been stored in a cloud domain, the cloud work device is a default storage cloud domain of an IP (Internet Protocol) camera; the cloud management device querying whether media data collected by the IP camera is stored in a cloud backup device according to the data query request; and if the cloud management device determines that the media data of the IP camera is stored in the cloud backup device according to the data query request, pushing an address of the media data to the cloud work device, wherein the address of the media data is used for the client to request for querying the media data from the cloud backup device, wherein the media data comprises video data, and the data query request comprises a first time period, the cloud management device querying whether media data collected by the IP camera is stored in a cloud backup device according to the data query request comprises: the cloud management device querying a storage trajectory of the IP camera in the first time period according to the data query request, wherein the storage trajectory records information on a cloud domain in which the video data is stored in each time period, and the cloud domain comprises the cloud work device and the cloud backup device; the cloud management device determining whether the storage trajectory records information on the cloud backup device; and if it is determined that the storage trajectory records the information on the cloud backup device, determining that the video data collected by the IP camera is stored in the cloud backup device. a cloud management device receiving a data query request sent by a client via a cloud work device, wherein the data query request is used to request for querying media data that has been stored in a cloud domain, the cloud work device is a default storage cloud domain of an IP (Internet Protocol) camera; the cloud management device querying whether media data collected by the IP camera is stored in a cloud backup device according to the data query request; and if the cloud management device determines that the media data of the IP camera is stored in the cloud backup device according to the data query request, pushing an address of the media data to the cloud work device, wherein the address of the media data is used for the client to request for querying the media data from the cloud backup device, wherein the media data comprises video data, and the data query request comprises a first time period, the cloud management device querying whether media data collected by the IP camera is stored in a cloud backup device according to the data query request comprises: the cloud management device querying a storage trajectory of the IP camera in the first time period according to the data query request, wherein the storage trajectory records information on a cloud domain in which the video data is stored in each time period, and the cloud domain comprises the cloud work device and the cloud backup device; the cloud management device determining whether the storage trajectory records information on the cloud backup device; and if it is determined that the storage trajectory records the information on the cloud backup device, determining that the video data collected by the IP camera is stored in the cloud backup device. the cloud management device querying a storage trajectory of the IP camera in the first time period according to the data query request, wherein the storage trajectory records information on a cloud domain in which the video data is stored in each time period, and the cloud domain comprises the cloud work device and the cloud backup device; the cloud management device determining whether the storage trajectory records information on the cloud backup device; and if it is determined that the storage trajectory records the information on the cloud backup device, determining that the video data collected by the IP camera is stored in the cloud backup device.