This study reports the experimental realization of room-temperature strong coupling between a single-photon emitter (SPE) and a bound-state-in-the-continuum (BIC) cavity. The system consists of SPEs in hexagonal boron nitride (hBN) and a dielectric cavity based on BIC. The strong coupling is achieved through a large Rabi splitting of ~4 meV, which is enabled by the narrow linewidth and large oscillator strength of the emitters, combined with the efficient photon trapping of the BIC cavity. This breakthrough demonstrates the potential for scalable quantum devices operating at room temperature. The research addresses the challenge of achieving strong coupling at elevated temperatures, where incoherent processes dominate. The BIC cavity, which perfectly traps photons, allows for strong coupling without being limited by cavity losses. The SPEs used are carbon-based color centers in few-layer hBN, known for their bright emission, non-blinking nature, and high single-photon purity at high temperatures. Their emission has a uniquely narrow linewidth, which is favorable for strong coupling. The study also explores the coupling between SPEs and BIC modes through angle-resolved and energy-resolved photoluminescence (PL) measurements. The results show clear spectral splitting and vanishing emission at normal incidence, confirming the strong coupling regime. The Rabi splitting is defined as ~4 meV at |θ| ~ 1.24°, corresponding to a coupling strength of ~2 meV. This is one order of magnitude higher than previous records for strong coupling in quantum dots at cryogenic temperatures. The findings highlight the potential of BIC cavities and SPEs in two-dimensional materials for scalable quantum devices. The study also discusses the importance of precise positioning of SPEs and controlling their emission properties for future quantum applications. The work provides a foundation for further research into the fundamental understanding of quantum dynamical systems in the strong coupling regime.This study reports the experimental realization of room-temperature strong coupling between a single-photon emitter (SPE) and a bound-state-in-the-continuum (BIC) cavity. The system consists of SPEs in hexagonal boron nitride (hBN) and a dielectric cavity based on BIC. The strong coupling is achieved through a large Rabi splitting of ~4 meV, which is enabled by the narrow linewidth and large oscillator strength of the emitters, combined with the efficient photon trapping of the BIC cavity. This breakthrough demonstrates the potential for scalable quantum devices operating at room temperature. The research addresses the challenge of achieving strong coupling at elevated temperatures, where incoherent processes dominate. The BIC cavity, which perfectly traps photons, allows for strong coupling without being limited by cavity losses. The SPEs used are carbon-based color centers in few-layer hBN, known for their bright emission, non-blinking nature, and high single-photon purity at high temperatures. Their emission has a uniquely narrow linewidth, which is favorable for strong coupling. The study also explores the coupling between SPEs and BIC modes through angle-resolved and energy-resolved photoluminescence (PL) measurements. The results show clear spectral splitting and vanishing emission at normal incidence, confirming the strong coupling regime. The Rabi splitting is defined as ~4 meV at |θ| ~ 1.24°, corresponding to a coupling strength of ~2 meV. This is one order of magnitude higher than previous records for strong coupling in quantum dots at cryogenic temperatures. The findings highlight the potential of BIC cavities and SPEs in two-dimensional materials for scalable quantum devices. The study also discusses the importance of precise positioning of SPEs and controlling their emission properties for future quantum applications. The work provides a foundation for further research into the fundamental understanding of quantum dynamical systems in the strong coupling regime.