The present invention relates to a method for providing a cloud streaming service, a device and a system for same, and a computer-readable recording medium having, recorded thereon, a cloud streaming script code for same. At the time of loading a webpage, the present invention loads the webpage with a predefined cloud streaming script code inserted therein and thus can perform processing such that the webpage can provide the could streaming service. Consequently, a pop-up window event or the like, which is incapable of providing the cloud streaming service, can easily be processed without any particular modification to an internal browser engine.