T'ien-t'ai Buddhism is a representative school of Chinese Buddhism. Both of its theory and practice's ways are excellent. There are many papers about the practice's ways of ”Perfect-teaching” (圓教), which are the most important ways of T'ien-t'ai Buddhism. But there is not a paper shows all the ways ”Perfect-teaching” has. This paper will collect all the practice's ways of ”Perfect-teaching” by analyzing all the books done by Zhi-yi (智顗AD.538-597). According to my research, the representative practice's ways of ”Perfect-teaching” is ”Nine Great Meditation” (九種大禪), the next one is ”One Hundred and Eight Samādhi” (百八三昧). ”Fang-dang Samādhi” (方等三昧), ”Dharma Lotus Samādhi” (法華三昧) and ”Jue-yi Samādhi” (覺意三昧) are not practice's ways of ”Perfect-teaching” primarily until they are subsumed in ”Four Forms of Samādhi” (四種三昧). In those books of Zhi-yi's later stage, ”Three Authoritative Works of T'ien-t'ai Buddhism” (天台三大部) and ”Commentaries of Vimalakīrti-nirdeśa Sūtra” (維摩經疏), the essential practice's ways of ”Perfect-teaching” became to be ”Threefold Contemplation in One Single Mind” (一心三觀) and ”Meditation in Ten Stages” (十法成乘), and ”Four Forms of Samādhi” (四種三昧) are their assistant practice's ways. Other practice's ways of ”Perfect-teaching” mentioned in the book of ”The deep meaning of Lotus Sūtra” (法華玄義) are just several practice's ways in general explained with the principle of ”Perfect-teaching”.