Interest in the new Web Of Things (WoT) standard is rapidly increasing. Specific interest in this proposed standard, which connects large numbers of devices together using the web, will continue to increase, thus increasing interest in HTML5. In such a situation, with the advent of HTML5, we are able to provide better service, which is significantly faster than the existing Web services. HTML5 uses an open Web standard as a Web application platform and is a next-generation productivity improvement for Web development, which works together to create a better user experience. HTML5 is a concept that includes a JavaScript API extension for CSS3, the web style sheet language. CSS3 is capable of providing a representation that is consistent with different browsers, in a convenient and effective manner. The JavaScript API allows the development of local applications, and can control the various resources and rich features. This includes WebStorage, WebWorker, WebSocket, and the GeolocationAPI. The function of WebSocket technology is to improve performance. This reduces the network load when compared to conventional methods. The WebSocket technology is often used when real-time two-way data communication is required. In particular, the positive effects of using the WebSocket technology are more pronounced while using web applications based on real-time two-way data communication. On the other hand, not many browsers that support HTML5 support web sockets. Further, if security is enabled while using a web socket, it proves to be disadvantageous. Currently, technical research is actively promoted for using WebSocket technology to improve its performance. In addition, future research can be conducted to study cross-browser compatibility with WebSocket technology, and reduction of its security vulnerability can be researched