Mei-San Village at the Southern transit highway is an entrance to the Yue-San National Park. The geological formation mainly consists of shales inter-layered with 50-150mm thick sandstones. The rock or debris fall is considered to be a primary form of slope failure in this area, and the sizes of rock fall range between a few centimeters and two to three meters in diameter. The soil retaining wall at Mei-San Village consisting of large concrete block facing was found under gradual deformations. Soil sampling from about 0.5m-deep of the backfill showed good physical and mechanical properties with a coulomb’s failure envelope of c=2.2 tf/m2 and =38.7. To investigate the mechanism of the wall deformation, further studies using soil boring, soil testing and slope stability analysis is necessary. To establish a warning system for the possible slope failure disaster, monitoring devices, such as : inclinometers, water level recorders, rainfall recorders should be installed, and a real-time monitoring system can also be used to increase the accuracy of the disaster warning system. A rock fall energy absorption net which has 1.5 times of energy absorption capacity than conventional rock-capturing nets is suggested for this area to prevent possible damage of the rock fall. It is suggested to use a rock fall with 1m in diameter for the design of the rock retention net. An average rock fall energy of 150 t-m or 1,500,000 Joule, and a 3.0m-high and 80m-long rock retention net are also suggested.