This paper examines the major scholar in Jinwenjingxue今文經學, Weiyuan魏源(1794-1857)’s Research on the Writing Time of the Poem < Eok抑 > included in 《Shiguwei詩古微》. According to 《Maoshixu毛詩序》, “WeiWugong衛武公 wrote the Poem < Eok抑 > to satirize Li厲 King, and also used it to alert himself. Since the Tang唐 dynasty scholar Kongyingda孔穎達, so many scholars including the Joseon朝鮮 dynasty scholars, recognized that WeiWugong衛武公 was not contemporaneous with Li厲 King, so they have submitted various views on this matter. In order to reveal the difference of the Weiyuan魏源’s research results on this issue from other scholars, I wrote a summary of the work of 《Shixu 詩序》, 《Shipu詩譜》, 《Kongshu孔疏》, Ouyangxiu歐陽修’s 《Shibenyi詩本義》, Zhuxi朱熹’s 《Shixubianshuo詩序辨說》, and studies by scholars after Zhuxi 朱熹. In the main section, I have studied the Weiyuan魏源’s research on the Writing Time世次 of the Poet < Eok抑 >. Based on the Hanshi story韓 詩說 and the thesis that 《Chunqiu history春秋》 was built after the disappearance of 《Shi詩》 defined in 《孟子》, Weiyuan魏源 concluded that the poems satirize a certain king, and also used to alert himself, and were generally written by 衛武公 during the Pyongwang平王 period. As a result, < Eok抑 > was moved to the end of 《Daya大雅》, and furthermore, “after moving the capital to the east, 雅 does not exist” that is one of the principles of Han漢 and Tang唐 dynasty poetics, was thoroughly destroyed.