This article is mainly concerned with analyzing in detail the five reports prepared by Ryutheh, the Russian consul general in Seoul. Ryutheh reported on the 3.1 movement through the Russian ambassador in Japan to the government of Colchak in the Omsk province. The reports of Ryutheh are very meaningful in that they record and evaluate the situation of Chosun, where the diplomatic relations with Russia were cut off, in the eyes of Russians. It was on the surface of the death of Gojong and his funeral that Ryutheh analyzed the cause of the 3.1 movement. The real cause, however, was the public anger over Japan's violent and oppressive rule. Ryutheh analyzed that Japanese resistance against the Koreans by coercing them to assimilate Koreans, and resistance against them, led to the participation of protesters naturally gathered in Seoul for the funeral of King Gojong. The Ryutheh pointed to the limitations of the religious movement in the 3.1 movement. Although Koreans were self-awakened and expressed their dissatisfaction with Japan through the ages, they were influenced by religion, especially Chondogyo, because they had little access to modern knowledge. Ryutheh pointed out that the Declaration of Independence is also limited. In other words, the Declaration of Independence in Chinese writing did not depict the construction of future independent Chosun and there was no accurate understanding of reality. But Ryutheh does not mention in his report whether the October 1917 revolution and socialism affected the 3.1 movement. The report of Ryutheh in Russian data clearly shows the situation of Joseon at the time and the fact that it can understand the cause and development process of the 3.1 movement. However, considering his personal history, his views and limitations in the report should be considered.