The invention provides a voting system based on smart mobile communication devices. It comprises at least one smart mobile communication device, at least one server device, a client module, and a server module. The client module is installed on the smart mobile communication device and it is used for temporarily saving the voter's information, submitting identity verification request, showing voting inquiries, and submitting votes. The server module is installed on the server device and it is used for storing the voter's information, verifying the voter's registration and identity, issuing and verifying the voting certificate, creating and publishing the voting affair, and calculating and publishing the voting contents statistics. The client module and the server module perform digital communications through a mobile communication network. The invention also provides a voting method based on smart mobile communication device. According to this invention, voting can be safe, convenient and fast.