The purpose of this paper is to suggest the use of the word spotting method for isolated word recognition in order to realize a telephone speech recognition system with high noise immunity. Our recent simulation test reveals that the word spotting method is highly immune to burst noise which causes the decrease of the recognition rate of the conventional system that needed to detect voiced periods by voice power before DP matching. Based on the algorithm using the word spotting method ,we have developed a new telephone speech recognition system. Mounted on one card, it consists of a 16-bit CPU (uPD70216), a DP matching processor (uPD7764) and a speech analysis processor (uPD77C25). In its maximum configuration, this system is capable of recognizing 400 words. In our evaluation test, this system showed a recognition rate of over 98% under noiseless conditions, and over 95% under noisy conditions where human voices and telephone bell sounds were present. The results of this test indicate that this telephone speech recognition system has a very high immunity to noise.