Cardano (ADA) is a third-generation smart contract platform designed to provide blockchain solutions for global issues. Its core is the academically peer-reviewed, provably secure Ouroboros proof-of-stake consensus algorithm, which is the world's first protocol of its kind. Cardano employs a unique layered architecture (separating the settlement layer and the computation layer), complemented by an extended UTXO (eUTXO) model and a Haskell-based Plutus smart contract platform, achieving modular evolution while pursuing maximum security and scalability. The project was founded by Charles Hoskinson after leaving Ethereum, establishing an academically driven development methodology where all core components are first peer-reviewed research papers before implementation. Its development strictly follows a roadmap named after scholars: Byron Era (mainnet launch), Shelley Era (decentralized staking), Goguen Era (smart contracts), Basho Era (performance scaling), and Voltaire/Provenance Era (on-chain governance). The latter, activated in January 2025, transferred control of a treasury worth over $1.5 billion to the community, establishing a tripartite governance system composed of the Constitution Committee, DReps (delegates), and SPOs (stake pool operators), making Cardano one of the most decentralized blockchains. The total supply of ADA tokens is capped at 45 billion, serving as transaction fuel, staking certificates, governance votes, and store of value. Its price trajectory (from 2017 ICO to 2026) clearly reflects market sentiment and the trade-offs between technological promises and practical implementation. Looking ahead, Cardano faces three major challenges: technically, the implementation of Acropolis modularity, Hydra layer-2 scaling, and Ouroboros Leios base layer upgrades; governance-wise, efficiently utilizing the large treasury while maintaining decision-making efficiency; and ecosystem-wise, incubating killer applications and improving developer experience. Meanwhile, the potential threat of quantum computing (Shor's algorithm capable of cracking elliptic curve signatures) looms over all blockchains, but Cardano's modular design and governance framework provide a relatively orderly path for quantum-resistant upgrades. At the institutional level, the project has established trust through national collaborations such as the Ethiopian Ministry of Education's digital identity initiative and is advancing a "2026 Breakthrough" plan to introduce institutional custody and stablecoins, facilitating a strategic transition from community assets to institutional allocations.