The LHCb RICH (Ring-Imaging Cherenkov) system, a key component of the LHCb experiment at CERN, provides charged particle identification over a wide momentum range from 2 to 100 GeV/c. This paper describes the operation, control, software, and online monitoring of the RICH system, as well as its particle identification performance. The RICH system consists of two detectors, RICH1 and RICH2, covering the angular acceptance of the experiment. The paper details the alignment and calibration procedures, including time alignment, magnetic distortion correction, and refractive index calibration. The performance of the RICH system is evaluated using data from the LHC, demonstrating excellent separation of hadronic particle types (π, K, p). The particle identification algorithms are described, and the results show that the RICH system effectively distinguishes between different particle types, with high efficiency and low misidentification rates. The paper also discusses the impact of background contributions and the background estimation process. Overall, the RICH system plays a crucial role in reducing combinatorial background and distinguishing final states in flavor physics experiments, particularly in studies of CP violation and heavy flavor decays.The LHCb RICH (Ring-Imaging Cherenkov) system, a key component of the LHCb experiment at CERN, provides charged particle identification over a wide momentum range from 2 to 100 GeV/c. This paper describes the operation, control, software, and online monitoring of the RICH system, as well as its particle identification performance. The RICH system consists of two detectors, RICH1 and RICH2, covering the angular acceptance of the experiment. The paper details the alignment and calibration procedures, including time alignment, magnetic distortion correction, and refractive index calibration. The performance of the RICH system is evaluated using data from the LHC, demonstrating excellent separation of hadronic particle types (π, K, p). The particle identification algorithms are described, and the results show that the RICH system effectively distinguishes between different particle types, with high efficiency and low misidentification rates. The paper also discusses the impact of background contributions and the background estimation process. Overall, the RICH system plays a crucial role in reducing combinatorial background and distinguishing final states in flavor physics experiments, particularly in studies of CP violation and heavy flavor decays.