The present invention relates to a Lego-type building block system and construction method. In the present invention, the longitudinal section is characterized in that a straight line and a curved surface are formed in a continuous combination of the engaging fastening portion 110 is formed on at least one side.Thereby, in order to form a castle wall, a wall structure, etc., not only the number of engaging fastening parts formed in a predetermined direction on the side of the block can be variously formed, but also the number of blocks for the curved structure and the side curvature can be adjusted. Provides an effect.In addition, in the present invention, when the shape of the inner groove penetrating through various blocks is determined according to the number of engaging fasteners formed in a predetermined direction on the side, it is manufactured to fit the lower end of piers, steel towers, decorations, etc. It provides the effect of providing a fastening structure.In addition, the present invention not only can easily manufacture a drainage passage, a moving passage, a glass structure, etc. by adjusting the height of each block and the length in the height direction, but also anyone including students experimentally using various Lego-type building blocks. It can provide the effect of installing and testing structures.
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