The main question of this report is how to realize the irrigation of cucumbers by wastewater. In order to make it more logical and easy to read, I also set up three sub-questions. What is the current situation of wastewater in the Netherlands? What methods can be used for reclaiming wastewater? What advantages and disadvantages does it have that use wastewater to irrigate cucumbers? Through reading a great plenty of journal articles, websites and other resources, I found the related information, then I rewrite and summary them.