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Two-dimensional (2D) soft materials, especially in their self-supported forms, demonstrate attractive properties to realize biomimetic morphing and ultrasensitive sensing. Although extensive eforts on design of self-supported functional membranes and inte?grated systems have been devoted, there still remains an unexplored regime of the combination of mechanical, electrical and surface wet?ting properties for specifc functions. Here, we report a self-supported flm featured with elastic, thin, conductive and superhydrophobic char?acteristics. Through a well-defned surface modifcation strategy, the surface wettability and mechanical sensing can be efectively balanced. The resulted flm can function as a smart umbrella to achieve real-time simulated raining with diverse frequencies and intensity. In addition, the integrated umbrella can even response sensitively to the sunlight and demonstrate a positively correlation of current signals with the intensity of sun illumination. Moreover, the superhydrophobic umbrella can be further employed to realize water rescue, which can take the underwater object onto water surface, load and rapidly transport the considerable weight. More importantly, the whole process of loaded objects and water fow velocity can be precisely detected. The self-supported smart umbrella can efectively monitor the weather and real?ize a smart water rescue, demonstrating signifcant potentials in multifunctional sensing and directional actuation in the presence of water.