The present disclosure discloses a terminal device, a system for providing picture and a method for transmitting picture and pertains to the field of network communications technologies. The method comprises: obtaining a URL of a picture to be transmitted according to a picture request initiated by a terminal device; determining the picture quality value of the picture to be transmitted according to the state of the network where the terminal device is located; determining the maximum resolution value of the picture to be transmitted according to the state of the network where the terminal device is located and the resolution value supported by the terminal device; sending the URL of the picture to be transmitted, the picture quality value of the picture to be transmitted and the maximum resolution value of the picture to be transmitted to a picture bed server; receiving the returned picture which had been processed by the picture bed server according to these parameters, and displaying it on the terminal device. Under the premise of not affecting the experience of viewing a picture by a user, the technical solution of the present disclosure realizes the beneficial effects of reducing the transmission size of the picture, increasing the transmission speed of the picture, and at the same time guaranteeing the picture quality as much as possible.