For a long period of time, textbooks have been irreplaceable in teaching and learning and become one of the most important media to propagate the gender ideology. For this reason, it is important to examine whether the textbooks contain gender bias or not. Even so, the textbooks from Taiwan senior high schools have seldom been examined over the past two decades. As such, the main purpose of the present study was to construct the criteria of gender bias in senior high textbooks. Based on the analysis of past research, the preliminary criteria of gender bias were built. With Delphi technique questionnaires, 12 main criteria and 17 subordinate criteria were built for the pictures, and 13 main criteria and 17 subordinate criteria for the context. In addition, adopting AHP questionnaire, the study found that gender stereotypes and linguistic gender bias are considered more important than gender imbalance and gender invisibility. Finally, several suggestions were made for textbook publishers, textbook review and approval committees, high school academic centers, high school teachers and future researchers.