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.
2. The method of claim 1 , further comprising: establishing the preset mapping relationship table, comprising, for each word in the word database: converting the word to corresponding standard pinyin; using the standard pinyin, generating at least one approximate pinyin according to the predetermined pronunciation similarity; establishing the mapping relationship between the standard pinyin, the approximate pinyin, and the word; and storing the respective mapping relationship for the word in the preset mapping relationship table.