The objectives of this study were 1) to classify the types of Quercus mongolica stands at Mt. Joongwang and compare their quality, and 2) to determine the proper future tree number of Q. mongolica per ha and the appropriate distance between the future trees. The results from this study were as follows : Q. mongolica stands at Mt. Joongwang was classified into four types, pure Q. mongolica stand as stand type Ⅰ, Q. mongolica - hardwood stand as stand type Ⅱ , Q. mongolica - Pines densiflora stand as stand type Ⅲ, Hardwood - Q. mongolica stand as stand type Ⅳaccording to mixture rate in stand volume. Stand type Ⅳ showed the best quality stem of Q. mongolica among the stand types, and the stem quality of Q. mongolica in Q. mongolica stand mixed with hardwood as stand types Ⅱ and Ⅳ was better than those in pure Q. mongolica stand as stand type Ⅰ and in Q. mongolica - P. densiflora stand as stand type Ⅲ. If the management goal for Q. mongolica stand is to produce its high quality-timber, it is desirable to sustain proper mixture rate of Q. mongolica with another hardwoods. The proper number of future trees in pure Q. mongolica stand as stand type Ⅰ was 122trees/㏊ and reasonable distance between the future trees was 9.15m. The distance between future trees in other stand types was 7.2m to 9.3m for stand types Ⅱ and Ⅳ, while 8.0m for stand type Ⅲ. Thus, the classification of Q. mongolica stand type based on stand character and maturity, and proper stem number of future tree and optimum distance between future trees would be a useful forest tending work.