This textbook integrates theoretical knowledge with practical application, focusing on key concepts and skills while following the principle of "necessity and sufficiency" and accommodating student development. It is organized into 3 projects comprising 11 tasks, mainly introducing PLC control and application technologies using the Mitsubishi FX3U PLC as an example. Adhering to students' cognitive laws and embodying vocational education characteristics, the book adopts a task‑based, progressively advanced practical teaching system. It integrates PLC structure and working principles, instruction applications, control system configuration, programming software use, and programming methodologies into training tasks, while theoretical knowledge is provided as self‑study links to cultivate independent learning and problem‑solving abilities. Throughout each task, the textbook fosters vocational awareness and habits, enhancing comprehensive vocational competencies. It emphasizes control system architecture, function utilization, program design, and system installation, debugging, and optimization, effectively meeting students' career development needs and reflecting the vocational education philosophy of "teaching through doing, learning through doing, and progressing through doing." The book is applicable to students majoring in electrical, electromechanical, electronic information, and electrical automation in secondary vocational and technical schools, and can also serve as a training and guidance textbook for intermediate and senior electricians.