<p>This paper presents two complementary certificateless collaborative signature schemes tailored for intelligent and information systems. The basic certificateless collaborative signature scheme enhances elliptic curve digital signature technology by eliminating the centralized aggregator and the key generation center, achieving efficient collaborative signing through dynamic pseudonym generation, partial private keys binding, and semi-interactive signature aggregation. Our design supports multiple signing sessions without requiring per-session re-initialization, making it suitable for continuous operational environments. The lattice-based certificateless collaborative signature scheme addresses quantum vulnerability by replacing elliptic curves with lattice-based cryptography. We implemented and evaluated both schemes through a comprehensive front-end system demonstrating complete workflow scenarios including collaborative key generation, signing, and verification. Experimental results validate the practical efficiency of our constructions across both classical and post-quantum settings.</p>