"World Musical Instruments" is a collection of display, retrieval, popular science as one of the musical instrument museum WeChat applet. The applet uses the database of traditional musical instruments of the China Conservatory of Music, covering four playing methods: plucking, playing, pulling and percussion, covering hundreds of musical instruments in various regions of China, and is currently the most comprehensive database of traditional Chinese musical instruments. This small program shows the musical instrument of the Hossa classification, eight-tone classification and related historical text data, while showing pictures and audio data of musical instruments. Small program can achieve screening and search function. Text search supports instrument name search, instrument-related keyword search, and phonetic search for homophones and words. In addition, we have developed an audio search function based on the algorithm in the paper "ML-based audio recognition of traditional Chinese musical instruments". The small program can recognize the sound of musical instruments according to the audio uploaded by users, and then search for musical instruments.