BEVM is a decentralized, EVM-compatible Bitcoin Layer 2 solution, leveraging BTC as gas. It enables Ethereum ecosystem DApps to operate on Bitcoin L2, promoting cross-chain interaction through Bitcoin light nodes and POS consensus. BEVM ensures data integrity by synchronizing Bitcoin block headers and cross-chain transaction proofs, supports decentralized cross-chain transactions using Taproot and POS nodes, and offers a robust consensus mechanism with up to 1000 nodes. Its VM and DApp layers provide a seamless experience for developers using Ethereum tools, accounts, and wallets, with the innovative approach of using BTC for transaction fees. BEVM's core visions include BTC EVM compatibility, a decentralized Bitcoin FX Protocol, and the future-oriented BEVM-Stack architecture for efficient Bitcoin L2 solutions deployment.