The invention discloses a reliable message communication device and method in a cloud computing environment. Related information is counted according to message sending, forwarding, publishing and other conditions in a message server, message rule engine configuration is matched, the message server is configured automatically, so that message service has the optimal performance on the premise that the stability is guaranteed, and the problem of low message sending reliability caused by loss of messages in the message server, server abnormity and other unstable factors under the conditions of message overload, unexpected outage and the like is effectively solved.