A self-propelled working robot according to the present invention
comprises a traveling assembly (1) having a wheel (6) and first and
second working assemblies (20, 50) that are detachable from the traveling
assembly 81). One of the first and second working assemblies (20, 50) is
selectively mounted on the traveling assembly (1). Each working assembly
has a type identification means (33) that enables identification of a
type of the working assembly. The traveling assembly (1) has a driving
motor (5) that drives the wheel (6), a wheel controlling means (41) that
controls rotation of the driving motor (5), a discriminating means (38)
that discriminates which of the working assemblies is mounted and a work
signal output means (39) that outputs a work signal for actuating the
working assembly (20, 50) in response to a result of a discrimination.