The purpose of this study was to examine the effectss of geometrical instruction utilising digital textbook on information processing and mathematical attitude toward learning of student with mathematical low achievement. In order to achieve these objectives the questions were selected. First, is there any difference effect of geometrical instruction utilized digital textbook and textbook to simultaneous information processing ability on students with mathematical low achievement ? Second, is there any difference effect of geometrical instruction utilized digital textbook and textbook to mathematical attitude on students with mathematical low achievement ? The results of this study are as follows. First, using geometrical instruction utilized digital textbook of the experimental group conducted post-test scores by the geometrical instruction utilized textbook of the control group than in the control group post-test scores higher than the pre-test score differences in the height of the experimental group were more simultaneous information processing ability. Therefore, geometrical instruction program utilized digital textbook by providing materials for a variety modules to students with mathematical low achievement is effective to enhance simultaneous information ability can. Second, there is significance effect to enhance mathematical attitude for students with mathematical low achievement by showing that using geometrical instruction utilized digital textbook of the experimental group conducted post-test scores by the geometrical instruction utilized textbook of the control group than in the control group post-test scores higher than the pre-test score differences in the height of the experimental group. The above-mentioned, geometrical instruction utilized digital textbook was find more effective instruction-learning method than geometrical instruction utilized textbook to enhance simultaneous information ability and mathematical attitude for students with mathematical low achievement. Therefore, to enhance simultaneous information ability and mathematical attitude for elementary students with mathematical low achievement need making apply variety geometrical instruction utilized digital textbook can.