以往要認識楚國的卜筮問題，常透過傳世文獻。今已出土幾批有關楚國卜筮記錄的竹簡，可以更加認識楚國的卜筮情況。卜筮可決疑，貞人可為官職，可見卜筮具有重要地位，貞人解讀卜筮結果，也扮演關鍵性的角色。貞人是傳承性很強的職業，有些同氏貞人甚至發展出世族性的專業。貞人有卜、筮分職的區別，卜人常多於筮人。又藉由繫聯可以判別卜具與筮具。其中長剌與新長剌，可為卜具。楚國出土卜筮簡記載的占卜用具常依據外觀與特質命名，許多名稱在傳世文獻未見，這也使對戰國使用的占卜用具有多一點認識。 占卜過程中，出土文獻卜禁內容歸結結果，與傳世文獻的卜禁內容不一，各有遵循，蓋「三王不同龜，四夷各異卜」。一問數占則是普遍情況。在戰國卜筮簡一事數占原由常有二：確認貞斷結果與深問細節。

Discusses by this article may know, the loyal person explains the divination result, the acting crucial role. The loyal person is the inheritance very strong occupation, somewhat even develops the old family specialty with the loyal person. Divine apparatus often based on outward appearance and special characteristic naming. As soon as asked that the number occupies is the universal practice, the incident number occupies the reason common two: Confirmed that breaks the result loyally and asks the detail deeply.