This invention discloses a network data prediction method, a network data processing device, and a network data processing method. The network data processing method is applied to a device that implements an open systems interconnection model (OSI model) and includes the following steps: generating a first data block and a second data block according to the OSI model; processing the first data block based on an error detection method to generate a first check code; encoding the first data block and the first check code to generate a first network data; transmitting the first network data; and receiving a second network data that includes a second check code; generating a target data according to a portion of the second data block and a portion of the second network data; and checking the target data according to the second check code.