系年是杜诗研究的核心内容之一。探究杜诗系年,首先应以遵从校勘学重祖本源流的原则为前提,重视杜集祖本王洙本在系年上的源头性。其次,应重视直接承袭王洙本的吴若本在系年上的作用。第三,季节、地理等因素可作为系年的重要标准。这三点在覆核杜诗旧系年编次与探究杜诗新系年编次时,皆可作为基本依据及标准加以应用。 Year of the Du Fu is one of the core research. In order to study the system of Duke’s poetry, we should first follow the principle of focusing on origin and origin of collation to lay emphasis on the origins of Du Shuzu’s Wang-Shu-Ben in the Department. Second, attention should be paid to the role of Wu Ruobin, who inherits directly from Wang Su-bin, in his department. Third, seasonal, geographical and other factors can be used as an important standard year. These three points can be used as a basic basis and standard in reviewing the old series of Du Fu’s poems and exploring the new series of Du Fu New Poems.