The invention discloses a server and a Chinese character segmentation method and device and belongs to the technical field of search engines. The Chinese character segmentation method includes: receiving a word segmentation instruction; acquiring a first Chinese character set; acquiring retrieving information corresponding to each character in the first character set according to preset corresponding relations; acquiring multiple combined characters and retrieving probabilities according to the first character set and the retrieving information corresponding to each character in the first character set; performing path combination according to the characters included in the multiple combined characters; acquiring the retrieving probability of each path; determining the path with the highest probability; performing segmentation on keywords according to the combined characters included in the path with the highest probability. Manual segmentation is omitted, independence on tools of dictionaries and the like is not needed, convenience in operation is achieved, data sources are dynamically updated, wrong segmentation modes can be rapidly corrected, high distinguishing degree is achieved for new characters, and accuracy in segmentation is improved.