The invention relates to an input method and an input device. A one-bit input method comprises an external input device and a virtual keypad, wherein the external input device is connected with a computer. The virtual keypad is provided with seven input fields, and various function switching keys are displayed a first input field. Initial consonants, vowels, spellings, Chinese characters, letters and symbols are respectively displayed in the input fields from a second input field to a seventh input field according selecting conditions. The input of commonly-used Chinese characters, English and punctuation symbols can be finished and basic document operation functions including deletion, returning and the like can be achieved only by operating one input key. A two-bit input method adopts two input keys to perform operation. By means of the input method and the input device, contents displayed on the virtual keypad are changed along with character inputting. Chinese, English words, numbers and the punctuation symbols are integrated, and a part of computer operation, such returning, deletion and various functions are integrated.