A novel solar regulation theory is proposed based on thermofluorescence and thermochromism for the first time. The solar absorption can be enhanced/suppressed by the turned-off/turned-on fluorescence and the broadband/narrowband high/low absorptivity at a low/high temperature. Based on this, a new daytime temperature-adaptive film is proposed, whose solar regulation ratio is up to 21.38 %, higher than those of the thermochromism-only film and most reported thermochromic microcapsules based films. Under the strongest solar irradiance, a maximal heating temperature of 8.15 °C can be achieved in winter, and a cooling temperature of 2.23 °C can be obtained in summer, showing very good temperature adaption. Combining this solar regulation with thermal emission modulation, a new all-day temperature-adaptive film is proposed. In winter, its heating performance is greatly enhanced during the day with a heating temperature reaching 14.26 °C, 6.11 °C higher than that of the daytime temperature-adaptive design, while its cooling performance is significantly suppressed during the night with an average cooling temperature of 1.56 °C, much lower than that of the daytime temperature-adaptive design. Total energy savings is improved globally, especially in the cold high-latitude regions. This research provides insights into the design of new and high-performance temperature-adaptive films, facilitating advancements in this field.