The invention discloses a cross-platform panorama three-dimensional display method and a cross-platform panorama three-dimensional display system. The method comprises following steps of judging whether a client-side browser is run on an internet operating system (IOS) device, loading a hypertext makeup language 5 (HTML5) scene display module if the client-side browser is run on the IOS device, and otherwise loading a flash scene display module; transmitting a scene identification (ID) and requesting a scene self-definition configuration from the client side to the server side; reading the scene self-definition configuration by the server side, and returning to the client side; requesting the data included in the scene self-definition configuration to the server side by the client side; calling the data from a database and returning the data to the client side by the server side after receiving the request; and creating a scene on the client side, and displaying the scene through the scene displaying module. Due to the adoption of the method and the system, the cross-platform function is realized, the method and the system not only can be applied to a personal computer (PC), but also can be used on different mobile devices, the application range is enlarged, the convenience can be improved, the individually-customized function can also be realized, and objects in the scene can be changed only by changing the scene self-definition configuration according to the requirements.