The paper designs and invents internet of things platform of One-Key for Help APP based on the mobile intelligent terminal (MIT) for the risk response of one-key for help, information for help, SMS for assistance, phone for support, map phone for advantage, voice message for help and video for aid. For Government Emergency Rescue Department (GERD), the platform is preset with China’s 110 police system, 119 fire alarm system, 120 emergency center system, 122 traffic incident system, as well as the government emergency rescue department(GERD), social public welfare rescue organizations(SPWRO), families and friends’ call for help, and is designed emergency call for help and rescue methods according to the regional scope such as nearby people, communities, cities, provinces and the whole country, to realize the call for help from individual to government, groups, kinship, region, etc.. This paper also defines single-risk identification, multiple risk environment and designs the risk identification & one-key for help algorithm. The One-Key for Help APP of IOT platform is applied for an actual case The APP platform can be used in several country or region and any city or village around the world. The One-Key for Help APP platform can be used in any country or region and any city or village in the world. A person only needs to register the APP and becomes used no matter what individual is in, wherever there is a mobile Internet, the concerned individual can use the One-Key for Help APP platform to send out the emergency information to their respective family, friends or GERD when they are in distress at any point of time. The APP has advanced functions and simple operation, which has scientific guidance and practical value for preventing all kinds of social emergencies.