A Hyper Text Transfer Protocol (HTTP)-Uniform Resource Identifier (URI) error-recovery method is provided. The HTTP-URI error-recovery method is applied in user equipment (UE). The HTTP-URI error-recovery method includes the following steps. The UE transmits a first HTTP request with a first URI encoding scheme to an application server through an interface. Then, the UE receives a specific error response corresponding to the first HTTP request from the application server. Then, the UE transmits a second HTTP request with a second encoding scheme to the application server based on the specific error response.