In modern times, conventional energy resources are depleting at a rapid pace, and clean renewable energy sources are becoming a research hotspot. In this regard, the triboelectric nanogenerator (TENG) is being used for collecting mechanical energy from the environment. However, the performance of the common solid–solid TENG is often limited by its bulky mechanical structure. Therefore, the present study proposes a novel TENG with the seesaw equal-arm lever structure, which is lightweight and convenient to use. The performance output of the proposed TENG is not limited by its structure. Moreover, it is capable of harvesting the energy of ocean waves in both horizontal and vertical directions. The performance of the proposed TENG was evaluated under different wave conditions using equipment such as motors to simulate the frequency and amplitude of ocean waves. The optimal voltage output achieved using the proposed TENG was up to 1055 V, and the current was up to 72 µA. In addition, a double-sided DSS-TENG was fabricated on the foundation of SS-TENG to exhibit improved energy conversion efficiency. Finally, the SS-TENG was applied successfully to power LED lamps and small hygrometers, which demonstrated that the SS-TENG had good stability and could serve as a feasible tool for large-scale collection of blue ocean energy.