The invention discloses detachable portable equipment and designing project to optimize the data communication using the progressive transmission. The scheme includes: detachable host machine and terminal, and the host machine cooperates with the terminal via the wireless communication mode, the communication mode includes but not limits to optimize the original data transmitted by progressive transmission. The invention is applicable to the portable electric device, for example: mobile phone, personal digital assistant, media player, digital camera, video camera and portable computer. Using the wireless communication mode to detach the host machine and the terminal of portable electric device, it changes the restrict environment of biokinetics for the electric device, and make the portable electric device has great handling ability, agile portability, and comfortable handle operation. Using the progressive transmission, it can reduce the transmission of failure data in the data communication, and realizes a data communication which can save data bandwidth, improve the real time of data, and protect the accuracy of data.