The objectives of the study titled “Dialect Preservation and Transference : Lao Khrung Dontoom District Nakhonpathom Province” were 1) to study about Lao Khrung language in Dontoom Nalon Pathom 2) to collect the local language information and to write manual “How to study Lao Khrurng?” for schools and other educational institutes in Dontoom Nakhon Pathom. In addition the project aimed 3) to conserve inherit and distribute Lao Khrung to remain in the society with qualitative research methodology. The scope of this research was at Ban Tung Phak Good Dontoom Nakhon Pathom (Lao Khrung Community area). The findings showed that the local language “Lao Khrung” was similar to the voice of Laotians in Luang Pra Bang which was the original homeland of Lao Khrung people in Dontoom. The written forms or alphabets could not be found in Lao Lhrung it had only the spoken language for communication. The sounds in Lao Khrung changed in many ways such as Sound Change Metathesis Sound Shifi Deletion Addition and Assimilation. Lao Khrung language was divided into 10 types including day time number animal flower tree vegetable and fruit characteristic body disease relatives occupation cloth decorations and miscellaneous. The study found that Lao Khrung had different consonant sounds tones words sentences and final particles from other Laotian people who immigrated into this area at the same time. Especially the final particles were much contrastive; they were used as a question a request and an affirmative sentence in the same sentence. Which type of these sentences were used depended on situation intimate status seniority respect social status intention mood and context in each conversation. Transmission inheritance and remaining of Lao Khrung resulted from learning from parents grandparents and elder people from daily routine being familiar with communication and practicing by imitation. The findings showed that conservation and inheritance of local language should be supported restored preserved to study and to collect the information of local language in order to stimulate local people to realize the importance of local language; the local course should also be made. Additionally the local scholars’ capabilities should be developed and supported to express out. Thus the inheritance restoration and transmission to the next generation help preserve and remain Lao Khrung in the Lao Khrung community onwards.