The main purpose of this study was to investigate the views of the primary teachers' future intention to use digital textbooks. In this paper, we take the Technology Acceptance as a foundation and extend the external variables including satisfaction usefulness, interactive learning activities, digital textbook effectiveness and user-interface design. Data was collected through questionnaire from 220 schools in some Chinese province; research is designed as structural equation modelling to analyze the key factors which influence teachers to use digital textbooks that is a new way of digital learning. This paper proposes a number of scientific hypotheses and validates the extending model. Results show that most of hypotheses are supported, which indicate that the extended variables are important factors to make a multi-level influence on teachers. Finally it is inferred that a conceptual model which is accepted easily by teachers, for understanding teachers' satisfaction, effectiveness and intention of digital textbooks and developing or designing the digital textbooks.