With the example of the course of water supply and drainage systems of buildings, we gave available methods for the construction of teaching-studying pattern for specialized courses of colleges of science and technology. The principles of problem designs were discussed, examples of the teaching-studying process of PBL pattern and methods of quality controls were offered, and the contrast between the PBL pattern and the traditional pattern was given. In the teaching-studying process, the choice of patterns should coordinate with teaching-studying contents and goals. Sometimes the two patterns could be adopted jointly to make full use of respective advantages.