The invention discloses a method and a server for supplying a picture to a computing terminal. The method comprises the following steps: receiving a picture access request sent by the computing terminal, wherein the picture access request comprises to-be-accessed picture information and network type information of the computing terminal; determining whether to perform format conversion on the picture according to the network type information of the computing terminal; and when determining to perform format conversion on the picture, acquiring original picture data corresponding to the picture information in the picture access request, and converting the original picture data to picture data in a predetermined format according to a predetermined format conversion rule, wherein the byte number of the picture data in the predetermined format is smaller than the byte number of the original picture data; and sending the picture data in the predetermined format to the computing terminal. Thus, by adopting the method and the server for supplying the picture to the computing terminal, the problem that when a mobile terminal accesses the picture, as the data size is relatively large, the problems that the loading speed is slow and the consumed network flow is large are solved, and the mobile terminal can rapidly load the picture, and the flow consumption when the picture is accessed is reduced.