A system comprising a user terminal communicably connected to a device through a network, the user terminal comprising: a call detecting means configured to detect, from a program, a call of a command for performing a remote operation with the device when the user terminal executes the program; an execution stop means configured to temporarily stop execution of the program corresponding to the call of the command detected by said call detecting means immediately before the command is called; an execution determination receiving means configured to receive, from a user, determination on whether or not the command of the program is called; a reliability management server which is communicably connected to the user terminal described in claim 1, the server comprising: an execution determination storing means configured to receive, from the user terminal, the input received by the execution determination receiving means and store the received input in a storage unit; a reliability calculating means configured to apply a statistical process to information related to execution determinations stored by said execution determination storing means to calculate reliability of the program related to the execution determinations; and a reliability providing means configured to transmit, to the user terminal, at least one of an execution determination stored by said execution determination storing means and the reliability calculated by said reliability calculating means, in response to a request of the user terminal; an execution determination reporting means configured to store the input received by said execution determination receiving means in the reliability management server; a reliability display means configured to display, on a screen, program information of the program corresponding to the call of the command detected by said call detecting means and at least one of information related to execution determinations of the program previously inputted by at least one user and received from the reliability management server; and an execution restarting means configured to restart the execution of the program stopped by the execution stop means when said execution determination receiving means receives input of permission. a call detecting means configured to detect, from a program, a call of a command for performing a remote operation with the device when the user terminal executes the program; an execution stop means configured to temporarily stop execution of the program corresponding to the call of the command detected by said call detecting means immediately before the command is called; an execution determination receiving means configured to receive, from a user, determination on whether or not the command of the program is called; a reliability management server which is communicably connected to the user terminal described in claim 1, the server comprising: an execution determination storing means configured to receive, from the user terminal, the input received by the execution determination receiving means and store the received input in a storage unit; a reliability calculating means configured to apply a statistical process to information related to execution determinations stored by said execution determination storing means to calculate reliability of the program related to the execution determinations; and a reliability providing means configured to transmit, to the user terminal, at least one of an execution determination stored by said execution determination storing means and the reliability calculated by said reliability calculating means, in response to a request of the user terminal; an execution determination storing means configured to receive, from the user terminal, the input received by the execution determination receiving means and store the received input in a storage unit; a reliability calculating means configured to apply a statistical process to information related to execution determinations stored by said execution determination storing means to calculate reliability of the program related to the execution determinations; and a reliability providing means configured to transmit, to the user terminal, at least one of an execution determination stored by said execution determination storing means and the reliability calculated by said reliability calculating means, in response to a request of the user terminal; an execution determination reporting means configured to store the input received by said execution determination receiving means in the reliability management server; a reliability display means configured to display, on a screen, program information of the program corresponding to the call of the command detected by said call detecting means and at least one of information related to execution determinations of the program previously inputted by at least one user and received from the reliability management server; and an execution restarting means configured to restart the execution of the program stopped by the execution stop means when said execution determination receiving means receives input of permission.