Abstract: Investigating the spatiotemporal evolution of industrial land allocation across different sectors in county-level areas is a crucial premise and foundation for optimizing regional land supply policies, promoting rational industrial layout, and advancing the transition from old to new growth drivers. Based on 15,900 data points from the land market network covering Shandong Province's industrial land supply from 2014 to 2023, along with enterprise survey data, this study takes 78 counties under Shandong Province as research units. Using methods such as spatial distribution centroids, standard deviation ellipses, and hot-cold spot analysis, it examines the spatiotemporal characteristics of industrial land use at both overall and sector-specific levels. The study further proposes optimization strategies for industrial land allocation in Shandong's counties, focusing on categorized optimization, zonally coordinated planning, and targeted support measures.