A comprehensive analysis on and comparison between spindle core drill and hydraulic top-drive core drill is made in this article. Special concern is focused on the technical economics in the drilling operation of the two types of the core drills. The result shows that hydraulic top-drive core drill is superior over spindle core drill not only in its light weight and portability, but also in its excellent drilling performance. With the increase of borehole depth, the comparative advantage of hydraulic top-drive core drill decreases. In this case, the length of drill rod stand should be increased to improve efficiency of round-trip operation.