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The construction industry is characterized by both high physical and psychological risks, yet supports of mental health remain limited.While advancements in artificial intelligence (AI), particularly large language models (LLMs), offer promising solutions, their potential in construction remains largely underexplored.To bridge this gap, we developed a conversational multi-agent system that addresses industry-specific challenges through an AI-driven approach integrated with domain knowledge.In parallel, it fulfills construction workers' basic psychological needs by enabling interactions with multiple agents, each has a distinct persona.This approach ensures that workers receive both practical problem-solving support and social engagement, ultimately contributing to their overall well-being.We evaluate its usability and effectiveness through a within-subjects user study with 12 participants.The results show that our system significantly outperforms the single-agent baseline, achieving improvements of 18% in usability, 40% in self-determination, and 60% in social presence and trust.These findings highlight the promise of LLMdriven AI systems in providing domain-specific support for construction workers.
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