This article adopts the wave-model and geometrically-positioning measurement way, there is not any coordinate and mathematics transformation. When the observer stays in the direction perpendicular to the direction of the velocity of the moving object, he measures directly the length of the high speed train, he finds that the length of the train keeps normal value without any change; at the same time, a way for experimental measurement is proposed. This conclusion shows that the phenomenon about the shortening of the moving-ruler got from the Special Theory of Relativity is not absolutely correct. That phenomenon about the moving-ruler being shortening appears due to the “observation effect”. It is not coincident with the analysis on the conclusion about the Special Theory of Relativity proposed by Einstein. The author finds out preliminarily that these different results are caused from different measuring methods.
wave-model, geometrically-positioning, the Special Theory of Relativity, shortening of the moving-ruler, not shortening of the moving-ruler, observation effect, Anisotropic,