Abstract: A learning device includes a setting unit configured to set a first value for a parameter of a communication device controlled by a computer using a learned model; a reinforcement learning unit configured to allow a learning model to learn; a model extraction unit configured to extract, as a learned model, the learning model; a model evaluation unit configured to determine whether performance of the learned model has reached first requirement; an updating unit configured to update the first value to a second value when the performance is determined to have reached the first requirement; and a model selection unit. The model evaluation unit determines whether the performance of the learned model updated to the second value satisfies second requirement. When the performance of the learned model updated to the second value is determined to satisfy the second requirement, the model selection unit selects that learned model.