A system and method for information inquiry to phone books or databases of mobile phones is disclosed. In one embodiment, the disclosed system integrates person names and company titles into keywords to find properly allocations in databases for storage purpose. An individual may inquire information by giving keywords under input modes by means of English characters, mandarin phonetic notations, or pinyin syllables for searching. A telephone number selected from the searched database records can then be dialed based on individual's selections.