A control system including a portable device and a server. The portable device includes: (1) a body; (2) a microphone for receiving a first audio data; (3) an audio coder for converting the first audio data to first audio data signals; (4) an optical sensor for reading a first optical data; (5) an optical coder for converting the first optical data to first optical data signals; and (6) a transmitter for transmitting at least the first audio data signals or the first optical data signals to the server. The server includes: (1) a communication device for receiving at least first audio data signals or the first optical data signals transmitted by the transmitter; (2) a data analyzer for extracting semantic information from the first audio data signal and for converting the semantic information into an audio command; (3) an optical analyzer for converting the first optical data to an optical command; (4) a memory device for storing programs to be performed; and (5) a CPU for receiving the audio command and the optical command, retrieving a program associated with the audio command or the optical command and for executing the retrieved program.