PURPOSE: An online vocabulary training method and a system thereof are provided to enable a user to easily access/learn various vocabulary without books and machines. CONSTITUTION: A server selects one specific vocabulary from a user terminal(S50). The server outputs the meaning of the selected vocabulary to the user terminal(S60). The server counts output time according to setup information(S70). The server deletes the selected vocabulary from an object output screen(S80). The server determines whether all vocabularies are deleted(S90).
