3. The EPG generating method according to claim 2 , wherein the maximum clique set comprises a maximum clique whose node must be greater than or equal to a node threshold, and the maximum clique corresponds to an optimum keyword group.
3. The EPG generating method according to claim 2 , wherein the maximum clique set comprises a maximum clique whose node must be greater than or equal to a node threshold, and the maximum clique corresponds to an optimum keyword group. 4. The EPG generating method according to claim 3 , wherein the step of generating the match score comprises: comparing the optimum keyword group with the program description to generate an occurrence frequency of a keyword of the optimum keyword group in the program description by the processor; and dividing the occurrence frequency by the keyword count of the optimum keyword group to generate the match score by the processor.