In this study, a framework for studying whether strategic audit planning has relevant significant effect in audit judgment, audit quality, and audit performance, including which components of strategic audit planning are more critical for auditors to effectiveness and efficiency of audit judgment and audit quality to enhance the better audit reputation. Additionally, both of moderators’ effects: environment uncertainty and time pressure are only positively associate with internal control system evaluation and fraud risk analysis. However, audit judgment and audit quality which serve as a mediator of the relationship between strategic audit planning and audit performance are utilizable. It indicates that audit judgment and audit quality clearly describe why audit performance is greater by strategic audit planning. Research analyzing study with this methodology will valuably contribute to rich understanding how tax auditors in Thailand exploit their capability in order to enhance and reserve their performance by strategic audit planning.