Communication method and system of internet

An Internet communication method applied to a first caller and a first callee, wherein the first caller is located in a first LAN and accesses the Internet via a first access point (AP), the first callee is located in a second LAN and accesses the Internet via a second access point, the Internet communication method comprises the following steps of:

• setting the first caller and the first access point, such that the voice packets of the first caller have a first transmission priority;
• querying a quality of service (QoS) server end regarding whether the network communication quality of the first LAN and the second LAN is above a pre-determined quality by the first caller via the Internet;
• transmitting a simulation packet to the first callee by the first caller for probing a transmission quality of an end-to-end transmission path of the first caller and the first callee if the network communication quality of the first LAN and the second LAN is above the pre-determined quality;
• determining whether a corresponding QoS parameter is larger than a threshold value according to the transmission quality;
• and
• inviting the first callee to communicate by the first caller via the Internet when the QoS parameter is larger than the threshold value.