[Problem] Providing a packaging method used in a bag-feeding and packaging apparatus, which can realize speed-up of the bag-feeding and packaging apparatus without limitation of movement acceleration due to the spilling or scattering of an article during movement and which can realize a larger amount of packaging in a short time, and the bag-feeding and packaging apparatus implementing the packaging method.[Overcoming Means] In the packaging method used in a bag-feeding and packaging apparatus P in accordance with the present invention, packaging processes are performed while a packaging bag F is intermittently moved to packaging stations 1 to 9 together with a mover 32, so that an article is packaged, and the packaging stations 1 to 9 include an article (a fluid) filling station 5 where an article filling process of filling the packaging bag with the article is performed. In the article filling station 5, a bag mouth of the packaging bag F is closed before movement to a subsequent packaging station (a steam deaeration/seal part preheating station) 6 after the article filling process has been performed.