Disclosed is an event communication apparatus for a protection relay, which effectively simplifies an event determination operation by a main processing module and a communication module, thereby enhancing updating. The event communication apparatus for the protection relay includes a shared memory configured to store and provide data needed to share, a main processing module configured to, whenever an event occurs, update previous event data to a status information of the event and a status occurrence time information as new event data, and write the updated event data into the shared memory, and a communication module configured to periodically read status information from the shared memory, compare the read status information with pre-stored previous status information to determine whether there is a status change, determine occurrence of a new event when there is the status change, and transmit corresponding event data to an supervisory monitor immediately when the new event occurs.