A method for sending information, the method comprising: determining, by a server, information queued to be sent to a user and a corresponding waiting time of the information (S101); determining a method of sending the information using the Internet, wherein the method of sending comprises a first method of sending wherein the server is capable of detecting whether the user receives the information, and a second method of sending wherein the server is incapable of detecting whether the user receives the information (S102); sending the information to the user using the first method using the Internet (S103); adding a predetermined answer response identifier to the determined information, and sending, to the user using the second method using the Internet, the information that includes the added answer response identifier (SI04); detecting whether the user has received and viewed, within the waiting time, the information sent using the first method (S105); detecting, based on determining whether an answer response including the answer response identifier has been received at the server, whether the user has received and viewed, within the waiting time, the information sent using the second method (S105); determining whether to send the information using a mobile communications network based on detecting whether the user has received and viewed the information sent using the first method and the second method, within the waiting time (S106); and sending the information using an information method of sending using the mobile communications network if it is detected that the user did not receive and did not view, within the waiting time, the information sent using the first method and the second method (S106). determining, by a server, information queued to be sent to a user and a corresponding waiting time of the information (S101); determining a method of sending the information using the Internet, wherein the method of sending comprises a first method of sending wherein the server is capable of detecting whether the user receives the information, and a second method of sending wherein the server is incapable of detecting whether the user receives the information (S102); sending the information to the user using the first method using the Internet (S103); adding a predetermined answer response identifier to the determined information, and sending, to the user using the second method using the Internet, the information that includes the added answer response identifier (SI04); detecting whether the user has received and viewed, within the waiting time, the information sent using the first method (S105); detecting, based on determining whether an answer response including the answer response identifier has been received at the server, whether the user has received and viewed, within the waiting time, the information sent using the second method (S105); determining whether to send the information using a mobile communications network based on detecting whether the user has received and viewed the information sent using the first method and the second method, within the waiting time (S106); and sending the information using an information method of sending using the mobile communications network if it is detected that the user did not receive and did not view, within the waiting time, the information sent using the first method and the second method (S106). <EOS>