From years of teaching practice, design and construction on multi-story and high-rise building structure, I found that some concepts of multi-story and high-rise building structure in teaching are ambiguous. In the calculation of horizontal load, some people cannot understand the using condition ib/ic≥3 and the design principle of stronger column and weaker beam for aseismic structure. Some people even think the condition and the principle are incompatible. In fact, they are different perspectives of two relative problems. To clear the concept and design correctly, verifications were put forward based on the essential meaning of the building structure.