A method and server for pushing a cellular lexicon. The server is used for receiving input method log information sent by a client; acquiring a client identifier and a client-selected word in the input method log information; searching for an undownloaded cellular lexicon in an undownloaded cellular lexicon list corresponding to the client identifier, acquiring a first matching lexicon comprising the client-selected word in the undownloaded cellular lexicon, and adding a first weight value to a lexicon weight value of the first matching lexicon corresponding to the client identifier; pushing the first matching lexicon to a corresponding client when the lexicon weight value is greater than a pushing threshold value; and deleting the pushed first matching lexicon. The server can push a cellular lexicon actually needed by the client, thereby increasing the input precision regarding a certain category of entries, and improving the input efficiency of the client.