An industrial heat island (IHI) refers to the phenomenon in which industrial complexes exhibit higher temperatures than their surrounding areas. It is classified as a subtype of the urban heat island (UHI). Most IHI studies have focused on the local scale (0.1-10 km), limiting their integration with broader UHI research. Additionally, the factors that influence UHI within industrial complexes remain understudied. To address these gaps, this study proposes a geospatial framework to analyze IHI, strengthen its connection with UHI research, and identify key industrial factors. The primary dataset for this framework island surface temperature (LST) obtained from Landsat-8 imagery. First, a hierarchical approach examines IHI at the mesoscale (10-100 km), using a chi-square test to determine its phenomenological independence at the city level. If IHI is present at an adequate scale, the LST profile method is applied to measure IHI extent and intensity at the local scale. Second, geographically weighted regression (GWR) quantifies the influence of industrial factors, including nitrogen dioxide (NO2), sulfur dioxide (SO2), digital elevation model (DEM), normalized difference built-up index (NDBI), soil-adjusted vegetation index (SAVI), automated water extraction index (AWEI), and workers. To validate the feasibility of this framework, it was applied to Incheon, South Korea, a city with diverse and aging industrial complexes. As a result, mesoscale analysis confirmed a significant association (p<0.05) between industrial complexes and UHI across all seasons. The local scale analysis indicated that IHI intensity was highest in summer but weakened in fall and winter, diverging from conventional UHI patterns. In addition, GWR results demonstrated varying impacts of industrial factors across complexes. The most influential variable was the industrial activity factor (SO2 and NO2). SO2 exhibited a strong positive correlation with IHI, while NO2 exhibited a negative correlation. For the industrial space factor, DEM indicated that lower elevations corresponded to higher IHI intensity. SAVI exhibited a moderate negative correlation, but its influence varied depending on vegetation type. However, NDBI and AWEI produced results that contradicted the trends identified in numerous UHI studies, likely due to coastal influences diminishing NDBI's effect and AWEI reflecting intensified IHI due to industrial wastewater-induced water quality degradation. In the industrial workforce factor, workers also showed a strong positive correlation. A comparison of GWR and OLS models confirmed GWR's superior performance, with higher adjusted R2 (0.9126 vs. 0.3677) and lower AICc values (111,146.4 vs. 171,605.4). In conclusion, this study establishes a scalable geospatial framework for IHI analysis, reinforcing its connection with UHI research. The findings underscore the need for tailored environmental measures addressing the unique characteristics of each industrial complex. Future studies should refine the framework by quantitatively connecting the results between the two scales and incorporating simulation models.