1. A method of matching speech to a contact name in a user's list of contacts, comprising: at a device having one or more processors and memory: storing the list of the user's contacts in the memory, wherein the list of the user's contacts includes a first contact; receiving input speech information; obtaining initial text corresponding to the input speech information and standard pinyin of the initial text; generating at least one approximate pinyin for the initial text based on predetermined pronunciation similarity information, wherein the pronunciation similarity information identifies non-standard pronunciations based on regional dialects; from a preset mapping relationship table stored in the memory, obtaining alternative text corresponding to the approximate pinyin of the initial text, wherein: the preset mapping relationship table includes a record for each word in a word database, the record including standard pinyin and approximate pinyin for the word, and a mapping relation between the standard pinyin, approximate pinyin, and the word; and the alternative text includes one or more words whose standard pinyin or approximate pinyin map, in the preset mapping relationship table, to the approximate pinyin of the initial text; matching the alternative text to the first contact; and performing an operation using the first contact.