1. A transcript mapping method comprising the steps of: obtaining a 5′ terminal tag and a 3′ terminal tag from a transcript of a gene; matching the 5′ terminal tag to at least a portion of a genome sequence to thereby identify at least one 5′ site therefrom, each of the at least one 5′ site having a sequence matching the 5′ terminal tag; matching the 3′ terminal tag to at least a portion of the genome sequence to thereby identify at least one 3′ site therefrom, each of the at least one 5′ site having a sequence matching the 5′ terminal tag; identifying at least one occurring segment, each of the at least one occurring segment being a sequence segment along the genome sequence extending from one of the at least one 5′ site to one of the at least one 3′ site, each of the at least one occurring segment having a sequence length; and identifying at least one feasible gene location, each of the feasible gene location being one of the at least one occurring segment having a sequence length not exceeding that of a predefined gene length.