1. A method of adjusting in a charged particle beam apparatus constructed to irradiate a charged particle beam on a sample to scan said sample, detect charged particles released from said sample by said irradiation, create an image of a region over which said sample is scanned on the basis of said detected charged particles, and control the focus of said charged particle beam and the brightness and/or contrast of said image on the basis of said created image, said method comprising the steps of: creating a first image when said charged particle beam is irradiated on said sample to scan a first pattern of said sample; controlling the focus of said charged particle beam and the brightness and/or contrast of said first image on the basis of said first image; storing said control values, or conditions used for the above focus and brightness and/or contrast control; and irradiating said charged particle beam on said sample to scan a second pattern different from said first pattern by using said stored control conditions.