What is the difference?

建筑师会设计一栋大厦/一个建筑群的外表,和所有相关的事情.但土木工程师就只会负担起兴建大厦,好像下石屎等等的工作.因为计算钢根是STRUCTURAL ENGINEER的工作.

A civil engineer is a person who practices civil engineering. Originally a civil engineer worked on public works projects and was contrasted with the military engineer, who worked on armaments and defenses. Over time, various branches of engineering have become recognized as distinct from civil engineering, including chemical engineering, mechanical engineering, and electrical engineering, while much of military engineering has been absorbed by civil engineering.
In most countries, a civil engineer has graduated from a post-secondary school with a degree in civil engineering, which requires a strong background in mathematics and the physical sciences; this degree is typically a four-year degree, though many civil engineers continue on to obtain additional degrees. In many countries, civil engineers are subject to licensure, and often, persons not licensed may not call themselves "civil engineers".
In the United States, most civil engineers practice in particular specialties of civil engineering, such as geotechnical engineering, structural engineering, transportation engineering, hydraulic engineering, or environmental engineering. Civil engineers are typically employed by municipalities, construction firms, consulting engineering firms, state governments, and the federal government.
In some places, a civil engineer may perform land surveying; in others, surveying is limited to construction surveying, unless an additional qualification is obtained.
An Architect is a person who is involved in the planning, designing and oversight of a building's construction. The word "architect" is derived from the Latin architectus or from the Greek arkhitekton. In the broadest sense an architect is a person who translates the user's needs into the builder's requirements. An architect must throughly understand the building and operational codes under which his or her design must conform. That degree of knowledge is necessary so that he or she is not apt to omit any necessary requirements, or produce improper, conflicting, ambiguous, or confusing requirements. He or she must understand the various methods available to the builder for building the client's structure, so that he or she can negotiate with the client to produce a best possible compromise of the results desired within explicit cost and time boundaries.