A translation system is provided. The system includes an input interface for receiving a term to be translated, a multi-language term processing module, a term correlation calculation module and an analysis module. The multi-language term processing module collects multi-language correlated terms corresponding to the term to be translated and language data sources, and establishes term pairs each including any two multi-language correlated terms having a relationship in translation. The multi-language correlated terms include at least the term to be translated and at least one candidate translated term in the target language. The term correlation calculation module calculates a term correlation value between the two multi-language correlated terms of each term pair and a self correlation value of each multi-language correlated term. The analysis module determines one of the candidate translated terms as the translation result term according to the term correlation values and the self correlation values.