A single word and multi-word term integrating system and a method thereof are disclosed, wherein a user uses an input unit to continuously input pinying codes for the system to find combinations of the pinying codes to provide word candidates for the user to choose, wherein the word candidates can be combined into a phrase or a sentence; when the inputted pinying codes are too long or incomplete, there might be a false prediction of a word or a sentence due to an incorrect combination of pinying codes; consequently, the system forcibly determines the pinying codes to be regarded as a single word and does not combine them with the follow-up pinying codes; then the system uses a full sentence prediction result display unit for the user to choose a correct word, thereby improving prediction accuracy.