Abstract: The present invention provides an input system and method applicable to an electronic device. The input method includes editing instruction data required to control execution of an operation by the electronic device and code message data corresponding to the instruction data, storing the edited data in a database, searching the database for the instruction data corresponding to the code message data by reading the code message data and referring to the code message data read, and controlling execution of the related operation by the electronic device. The present invention allows various instruction-related operations to be executed by an electronic device not installed with input equipment such as a mouse and a keyboard, prevents system failure which may otherwise arise from a human-caused mistake in operation, enhances operating safety and efficiency of the electronic device, and effectively reduces the cost of hardware configuration of the electronic device.