Method, device and system for managing calendar information

The disclosure relates to the field of applied electronic technology. Provided are a method, device and system for managing calendar information. The method comprises: receiving shared calendar information transmitted by a first calendar client, wherein the shared calendar information is obtained by modifying, by the first calendar client, original calendar information displayed on the first calendar client; and pushing the shared calendar information to a second calendar client so that the second calendar client uses the shared calendar information to update second original calendar information, wherein the second original calendar information is obtained by adding, by the second calendar client, corresponding event information to a designated date page of a calendar interface displayed on the second calendar client. The disclosure solves a problem in which calendar information is less accurate in related management techniques, thereby increasing accuracy of calendar information. The disclosure is applied to calendar information management.