With the vigorous development of Internet of things (IoT), related sensing devices are widely applied to different fields. The involving of cloud computing to IoT makes applications more scalable and convenient. The IoT device management platform plays a vital role in these application scenarios. This platform supports for a variety of application services on the Internet such as storing, screening, sharing, and analyzing sensed data. This platform also supports the integration of multiple transmission protocols for physical devices such that sensed data can be seamlessly aggregated and integrated into this platform. We design an online IoT platform that is built up with multiple network services and provides the visualization of sensed data, unified heterogeneous protocols, anomaly data analysis, and the combination of social network. Users can easily experience these advantages by operating on our developed web site.