This Independent Study has the objective for compares with percentage of the correct word in the sentence. In case of the environment is the same environment. It is same text, same Thai Dictionary, and same the group linguist. These environments fix the standard. In this Independent Studies, The original percentage of the correct word, they have not a middle standard and the have not relationship in all Thai Word Segmentation Algorithm. They make its can not compare with percentage of the correct word. Last, We know the environments affect the percentage of the correct word in the sentence.