Algae bloom causes water hypoxia and reduces water transparency, resulting in the suffocation and death of aquatic animals, destroying water ecosystems, and endangering human life and health. The harm of algae bloom and the major techniques for in situ algae control by the methods involving physics, chemistry, and biology are summarized; the merit and demerit of each technique are analyzed based on the algae control practices discussed. It is suggested that by removing excessive endogenous nutrients complemented with the algae control technique, meanwhile strengthening the environment quality management by intercepting pollution; these comprehensive measures would become the important direction to accomplish the long-term control of algae and the restoration of water quality.