This research studies about the language and Lanna’s alphabets are the symbols arrive at the evolution of the Lanna kingdom since the founding of Chiangmai in 1839, Buddhist eras until now. There was the development to the evolution of the literary works in the age later, such evolution not only made the Lanna became to be knowledgeable place, but also the one important intellectual place as well.  The main reason leaded to the research project because there was an exactly purpose set down for the study of  the impact of Buddhism on the Lanna Dialects and there was especially objective for study influence characteristic in the Buddhism that has to build some of Thai Lanna dialects, and how is the characteristic of the influence in the Buddhism aforementioned on the Thai Lanna dialects. Somehow such influence related to the way of life, tradition, and the beliefs of the Thai Lanna people.   The procedure to manage on the qualitative research, the researcher used forms likes model to record the data and added an enhance interviewing like model; “In-depth Interview” then has done the data analysis from the collected data those were originally area studied, and from the theory was as the frame of an explanation of an educational result in the present, then also took the chosen way likes the model to specify (Purposive Sampling),  and directly chosen the criterion for interviewing the people who speak Lanna language and live in eight North Provinces, by way of selection the sample (Cluster Sampling) through the contact with specific informants (Key informant) who have four skills in the ability of listening speaking reading and writing about Thai Lanna Dialects before go-having such data those implies on the research output.  Conclusion; influence character on a “study of  the impact of Buddhism on the Lanna dialects” was found that, the first phenomena is the imitation of some of the Pali – Sanskrit words or Buddhism’s words without changing anything or copying, the second phenomena is The Pali - Sanskrit words are loaned to use by changing where the figure of the initial or the end of  the words for the convenient of the Thai Lanna’s tongue, and the thirdly is an establishment of some particularly dialect of Thai Lanna words to replace the Pali -Sanskrit but, those are still having the meaning remain as ever.  On the other hand, some special of the Dialect of Thai Lanna words are found during the research work; on the conditions those follow the belief is based on philosophy and dogma of the Buddhism as well. the suggestion who take an interest to study on this research work is , when, be curious Lanna- words and their meaning, through their roots, could you please get back study those words, in the supplement, are given on the page No. 125 arrive at 213 but, if, want to know background history of the vocabularies in detail which be a category, please get back see in chapters No. 4 since,  the page No. 66 up to 11, you  can understand the research easily and  more effectively.