Required strength can be surely obtained by setting a proper cement mixture rate suitable for the condition of the soil to be improved. Use of an accelerating agent reduces the period to obtain a required strebgth. So, significant reduction in project period is available. The strength of the improved soil prevents settlement due to consolidation. Solidification of soft ground insitu leads to no sea water contamination or secondary pollution. In addition, the low vibration and low-noise during operation does not affect surrounding structures. Great power of digging and mixing enables the easy penetration through the relatively hard stratum on the way, anchorage to the bearing stratum, and improvement to various types of foundation. The centralized control system for the slurry discharge, improved penetration depth, number of rotation, and the control of the slurry plants enables integrated execution control. Compared to conventional methods, CDM saves resources because it stabilizes soft ground without using a great amount of sand and gravel. Entire project costs are more effective than other methods for the greater strength obtained and less volume of ground to be improveed.