Abstract: Promoting educational equity with informatization is a major and urgent subject of the time with its far-reaching strategic significance and overall orientation in advancing the modernization of education and building a country of strong education. However, the related theoretical research shows the phenomenon of "practice going first and cognition lagging behind", and the practical validity and generalized direction of research are often questioned. The reason lies in that the subject involves the public allocation of educational resources while the boundary of educational action under the guidance of educational policy cannot be equated with the boundary of theoretical analysis. With the innovation of information technology, research tends to fall into the "chasing hot topics" type of superficial thinking but ignore what the research question is. It is difficult to comprehensively examine the topic "informatization promoting education equity" from a higher-level and more stable perspective. Based on the social science and humanities attributes of educational issues, the framework of the research question domain of "informatization promoting education equity" is put forward and the corresponding suggestions for optimizing the research question are proposed from two aspects: empirical research based on causality theory and normative research beyond instrumental rationality. The research helps to understand the concrete research object of the topic "informatization promoting education equity", provides an analytical framework for corresponding practice and review, and proposes a question framework for conducting prospective studies and reserve research.