With the rapid development of the internet, big data, and cloud computing technologies, blockchain has emerged as a novel approach for information asset circulation and privacy protection. Characterized by decentralization, immutability, transparency, and traceability, blockchain has broad prospects in maritime management. Current maritime data collection methods often rely on a one-to-one model, which has drawbacks such as low efficiency and high security risks due to centralized data storage. To address these issues, this paper proposes a multiparty data collection model based on cooperative game theory, particularly for small fluctuations in data. The model uses blockchain oracles for secure data collection and the SMPC (Secure Multi-Party Computation) framework for data validation, enhancing the comprehensiveness and security of data acquisition. A secure gateway based on Raspberry Pi and IPFS is used for data storage. Simulated sensors collect temperature data, and security and performance tests confirm the model’s feasibility and security.