By designing a curriculum concentrating on Taiwan’s history textbooks as major teaching materials, pairing with summary strategy, the author intends to understand the effect of summary strategy of social texts reading has on 5th graders’ comprehension capability and academic achievement, and the satisfaction the experiment group has towards on the summary strategy learning. Adopting quasi-experiments of unequal pre- and post-test and targeting 5th graders of Zhi Hu Elementary School of Taichung City, among them 31 schoolchildren are in the experiment group, 30 in the control group, a 9-weeklong social domain instructing activity based on textbook reading is designed for the experiment group. Research instruments include “test on schoolchildren’s Chinese reading comprehension,” “test on schoolchildren’s social domain achievement,” “learning satisfaction scale,” and“summary single study”. Major findings are: A. There is no significant difference in the “pre- and post-test” results between the experiment and the control groups and among the experiment group itself. However the “post-test” result of both groups and the “pre- and post-test” result of the experiment group have reached significant difference, indicating a concrete effect is shown in upgrading schoolchildren’s summarizing capability. B. A significant difference is shown between both groups, indicating “summary strategy merging into social textbooks reading” curriculum do help schoolchildren in their understanding of the content and quick grasping of the main points, which further contribute to their academic achievement. C. The experiment group has a positive mentality and attitude towards “summary strategy merging into social textbooks reading” curriculum in three aspects: cognition, emotion, and skill. And a high reading comprehension effect is achieved by constant practice of “the four steps of summarizing sheet.” Based on the study result, suggestions on curriculum designing, teaching strategy and future study are made for schoolteachers in their reference to summary strategy and follow-up studies.