Provided is a function for more efficiently pulling files in a browsing folder is implemented. A client pulls folder lists items in a basis of a number displayable on a screen thereof by subdividing a process pulling the folder lists items. In detail, a new operation is defined between a client and a server, wherein the client receives a total number of folder lists items from the server, and the server receives a displayable number of folder lists items from the client. Thereafter, the client pulls folder lists items corresponding to the displayable number defined by the client from among the total folder lists items using packets such as start, forward, backward, and end.