Model generation method, system and device and medium

The embodiment of the invention provides a model generation method, system and device and a medium, and belongs to the technical field of machine learning, and the method comprises the steps: carrying out the training of an initial model through a pre-obtained image sample set based on a preset training parameter, and obtaining a first model; wherein the initial model is used for executing a first task; in response to triggering of a target condition, performing expansibility training on the first model, the expansibility training comprising: updating the first model based on the collected image; and/or training at least one second model based on the collected images and the first model; wherein the second model is used for executing a second task different from the first task.