An apparatus and method for recording activities of an avatar in a virtual world by means of a computer including: means for dividing the virtual world into a plurality of blocks each provided with a unique ID; means for recording a movement history in a storage area of the computer, the movement history including the ID of each block which an avatar acting in the virtual world enters and a time point at which the avatar enters the block; means for deleting the movement history between the first and the last blocks of a plurality of blocks which the avatar enters if the plurality of blocks are continuous in a straight line in one direction; and activity record DB recording means for recording, as an activity dataset in an activity record DB, an event content, the movement history and a repetition count of an event.