The present invention sets forth a method for content responding, a method for content requesting, a content responder and a content requester. A content responder receives a first request from a content requester via a network. Then, the content responder generates a first content based on the first request. Then the content responder receives a second request from the content requester via the network. Then, the content responder generates a second content based on the second request. Next, the content responder compares the second content with the first content. After that, the content responder transmits a second response with regard to the second request to the content requester via the network. The second response is generated based on the result of comparison. According to the invention, if there is a very small difference between the first content and the second content, network bandwidth can be saved, the transmitting time of content will be reduced, and thus the waiting time of the user to view content will be reduced. The present invention is particular beneficial to the existing industries (for example, the banking industry) that adopt narrow band network widely.