"Theme-guided learning" is the teaching method that aims to build more flexible and effective electronic technology courses in the teaching space which action system and subject system are mutually dependent,and its characteristics are:building guided learning project and steering independent learning surrounding action theme.

The article discusses the meaning and contact of "theme then writing"?"writing then theme"and"theme first", the aim is that put the theory into practice.

Research on Focused Crawling Technique for Vertical Search Engine;

Research of Ontology-based Focused Crawling Technique