Scutellaria baicalensis Tablets (SBTs), sourced from the root of Scutellaria baicalensis Georgi, demonstrated notable potential as natural antioxidants for functional-food development. To comprehensively evaluate SBT quality and antioxidant capacity, we developed an integrated analytical workflow combining electronic-transition-theory-driven multi-wavelength concatenation, a binary evaluation system (BES), dual-channel high-performance liquid chromatography-online antioxidant activity coupling (DC-HPLC-OAA), and electrochemical profile integration. First, guided by electronic-transition theory, the multi-wavelength concatenation captured subtle inter-flavonoid variations across several wavelengths, thereby surmounting the constraints of single-wavelength detection. Second, the binary evaluation system, combining Sm and quantitative Pm parameters, provided a multidimensional appraisal of product quality, correlating robustly with key-component levels (e.g., baicalin). Chemometric analysis further confirmed the precision and reliability of Sm and Pm, yielding a triadic framework: "high-dimensional data dimensionality reduction-key component mapping-quality threshold determination." Third, DC-HPLC-OAA systematically screened the antioxidant activities of major flavonoids (baicalin, baicalein, wogonin), whose cumulative capacities were then quantified by electrochemical profile integration. Collectively, this integrated approach established a robust foundation for precise SBT quality control and underscored their promise as natural antioxidant ingredients in functional foods.