The invention discloses an information communication method and system, and a server, and relates to the technical field of information. The method includes the steps that firstly, a first device used by a first user has access to the server through the Internet, the server has access to a telephone network and can receive and send short messages, and a second device used by a second user has access to the telephone network and is not connected with the Internet; secondly, the server receives instant messages which are sent by the first device through the Internet, wherein the instant messages include message content and receiver information, and the receiver information is an account number or a telephone number of the second user; thirdly, the telephone number of the second user is found according to the account number of the second user, or the telephone number of the second user is extracted from the instant messages; fourthly, the message content is sent to the second device in the form of a short message through the telephone network according to the telephone number of the second user. By means of the information communication method and system, and the server, smooth and bidirectional instant communication can be achieved for the second user who uses the telephone network even when the second user is not connected with the Internet or not provided with a client side, and therefore a barrier between the Internet and the telephone network is broken.