Tibetan input method and system

The invention discloses a Tibetan input method and system, relates to a character input method, and is invented for solving the problem of existence of redundancy codes and repeated codes or low input efficiency in the prior art. According to the technical scheme disclosed by the embodiment of the invention, the Tibetan input system comprises an input module, a keyboard definition module, a Tibetan word stock and a processor, wherein the input module comprises 47 input keys and is used for a user to input Tibetan characters; the keyboard definition module comprises a plurality of storage units; each storage unit corresponds to one input key; each storage unit stores one or a plurality of Tibetan characters; when each storage unit stores a plurality of Tibetan characters, preset ambiguity layout rules are conformed to; the Tibetan word stock is used for storing Tibetan pre-combined words; and the processor is respectively connected with the input module, the keyboard definition module and the Tibetan word stoc