The invention discloses a smart home system based on context awareness, comprising a sensor, an execution part, a user recognizer, a smart home control module, a context management module, a context extracting module and a context reasoning module. When a user uses the smart home control module to operate, the smart home control module triggers corresponding action to sense the basic information and the environment position information of the user to be sent to the context extracting module; the context extracting module generates the basic context information and advanced context information which are sent to the context reasoning module; according to the context information, the context reasoning module invokes a user preference record from the context management module and matches the user preference record with the basic context information for reasoning; the context management module stores the operation record of the user, and the operation record can be invoked by the context extracting module and the context reasoning module. The smart home system based on the context awareness of the invention has the advantages of high and active intellectualization and favourable configurability.