A two-fluid model was developed to predict the wall temperature of a tube during inverted-annular film-boiling (IAFB). This model correctly accounts for the effects of how variables such as mass flux, inlet subcooling, heat flux and pressure. The relations for shear stress and heat transfer rates are the major components in this model. A unique methodology is utilized to derive these relations. Comparisons between the two-fluid model predictions and experimental data from four fluids (water, Freon-12, Freon-22, and Freon-134a) show good agreement over a wide range of flow conditions. The comparisons resulted in overall root-mean-square (RMS) errors of 14.90, 5.67, 6.58 and 6.19% with the data of water, Freon-12, Freon-22 and Freon-134a, respectively. The model shows better performance than other IAFB prediction methods that were assessed during the course of this study.