The paper studies the decision-making approach of an overconfident newsvendor taking into account the influence of the retailer's biased belief on the actual demand. Considering the emergency purchasing cost, this paper investigates the joint decisions about order quantities and pricing of overconfident retailers with the price-dependent demand which is affected additively and multiplicatively by a random factor, respectively. The existence and uniqueness of the joint pricing and ordering decisions are proved for two different demand models, and the expressions of optimal decisions are deduced. Then the impact of the retailer's overconfidence on its optimal decisions and the corresponding actual and belief expected profit are discussed, the profit of overconfident and the rational retailers are further compared. It is found that, overconfidence behavior leads to the loss of expected profits of the retailer, which provides theoretical evidence for the pricing and ordering decisions.